Born on this day 1906, Dietrich Bonhoeffer, German theologian, pastor, and political dissident.

A photograph of Dietrich Bonhoeffer taken in 1932 at Gland near Lake Geneva in Switzerland. Berlin State Library.

Dietrich Bonhoeffer was born on 4 February 1906 in the city of Breslau (now Wrocław in Poland), the sixth child of a middle class, intellectual family. His father was the psychiatrist and neurologist Karl Bonhoeffer, while his mother, Paula Bonhoeffer was a teacher and the granddaughter of both the Protestant theologian Karl von Hase and the painter Stanislaus von Kalckreuth. As such he was always destined to gain an education and enter a profession, settling on theology following the death of his older brother, Walter Bonhoeffer, during the First World War.

Bonhoeffer studied theology at the universities of Tübingen and Berlin, before completing a doctorate at Humboldt University at the age of 21 in December 1927. He then travelled to Barcelona, where he served as assistant pastor to a German-speaking congregation for two years. In 1930 he travelled to New York to study at the Union Theological Seminary for a year. Bonhoeffer appears to have been somewhat unimpressed by the quality of academic study at the seminary, but during this time he did discover the Abyssinian Baptist Church in Harlem, where he worked as a Sunday school teacher and became an advocate of ecumenical Christianity (co-operation between different Christian churches and traditions).

Upon returning to Germany in 1931, Bonhoeffer took up a lectureship at the University of Berlin, and was appointed as a youth secretary to the World Alliance for Promoting International Friendship through the Churches, a precursor to the World Council of Churches, and ordained as a pastor of the Prussian Union of Churches.

In  November 1932, a group calling themselves the Deutsche Christen (German Christians), who sought to align the church with the nationalist views of the rising Nazi Party, won a third of the elections for officials within the Prussian Union of Churches. One of the notable policies of the Deutsche Christen movement was that Jews (defined by the religion of their grandparents) could not become Christians through baptism, but remained a separate racial group, excluded from the church. This brought the organisation close to a schism, due to factional fighting with the Young Reformers, a group who sought to bring the church closer to the teachings of Christ. 

In January 1933 Adolf Hitler became Chancellor of Germany, and shortly after ordered new elections at all German Protestant Churches. Bonhoeffer was involved in trying to organise opposition to the takeover of the church, campaigning for the election of non-Nazi aligned officials, but in the event Deutsche Christen were able to take over all churches except the Westphalian Union and the Baptist churches of  Bavaria, Hanover, and Württemberg.

Alarmed by this development, Bonhoeffer tried to organise a theological strike, advocating for pastors to refuse to conduct all ceremonial services, including baptisms, conformations, weddings, and funerals, although he was eventually persuaded against this. He then went on to co-author a document called the 'Bethel Confession' which asserted primacy of the scriptures in defining the Christian faith, in opposition the idea that church doctrine can be redefined to suit the political situation of any given period. In the event, this document underwent substantial revision by different authors before being published, with Bonhoeffer refusing to sign the final version, which he felt had been altered to avoid risking offending the Nazi regime. 

In September 1933 the church formally accepted the Deutsche Christen position on Jewish conversion to Christianity, and all church officials of Jewish descent were expelled. In response to this, Lutharian theologian and pastor Martin Niemöller founded the Pfarrernotbund (Emergency League of Pastors) to defend the principle of baptism as a means of conversion. The following month Deutsche Christen passed a resolution demanding that the Old Testament be removed from the Bible. deeming it a Jewish document, leading to thousands more pastors joining the Pfarrernotbund.

Around this time Bonhoeffer turned down the offer of a parish in Berlin, instead travelling to London for a two year appointment as a pastor to two German-speaking churches in Sydenham and Whitechapel. Although accused by some of running away from the battle in Germany, Bonhoeffer acted as an agent for the Pfarrernotbund, which in 1934 became the Bekennende Kirche (Confessing Church), remaining in contact with Martin Niemöller, and using his contacts through the ecumenical movement to develop a network of allies among the Christian community in England.

In 1935 his stint in London came to an end, and although offered a chance to study at Mahatma Ghandi's ashram in India, Bonhoeffer chose to return to Germany where he he resumed teaching at the University of Berlin, as well as setting up an underground seminary for the Bekennende Kirche. In August 1936 Bonhoeffer lost his position at the university, having been denounced as a pacifist by Theodore Heckel, a newly appointed bishop and supporter of Deutsche Christen. 

Following this, Bonhoeffer dedicated all of his time to the Bekennende Kirche, operating largely from the estate of Ruth von Kleist-Retzow, Countess of Zedlitz-Trützschler, a German noblewoman, supporter of the Kirche, and opponent of the Nazi regime. In August 1937 the Bekennende Kirche was officially banned and a number of members were arrested. Bonhoeffer moved further underground, travelling from village-to-village to teach, and running an underground seminary at Groß Schlönwitz in what is now northern Poland. In 1938 Bonhoeffer was banned from entering Berlin, and moved his seminary to Tychow, also now in Poland. 

At this time Bonhoeffer's brother-in-law, Hans von Dohnanyi, who was married to Bobhoeffer's older sister Christel, was working at the Abwehr (German Military Intelligence). Although essentially a civil servant, von Dohnayi was familiar with many senior members of the Nazi Party, and was convinced that a major war was about to break out. Along with other members of the Abwehr, von Dohnayi had been involved with the German resistance movement for several years, ensuring that the crimes of the Nazi Regime were carefully recorded so that they could one day be held to account, and helping a number of Jewish Berliners to escape to Switzerland. 

With war looming, von Dohnayi was concerned that Bonhoeffer would be conscripted into the army, and that the idealistic pastor would refuse to swear an oath of allegiance to Adolf Hitler or bear arms, both of which could earn him a death sentence. To avoid this von Dohnayi recruited Bonhoeffer into the Abwehr, arguing that his contacts through the ecumenical movement as evidence that Bobhoeffer would make an excellent agent.

In June 1939 Bonhoeffer was dispatched to the Union Theological Seminary in New York, although he returned to Germany two weeks later, despite pressure from his friends to remain, citing a need to be in Germany during the coming war if he was to have any part in rebuilding the country during its aftermath. 

Back in Germany, Bonhoeffer continued to be harassed by the authorities, despite being a member of the Abwehr. while the resistance movement within the Abwehr tried to use him to make contact with the governments of the Weston powers, in order to gain their support. In 1942 he flew to (neutral Sweden to meet with  George Bell, Bishop of Chichester and a friend of Bonhoeffer, hoping to gain the support of the British Government, for coup attempt and planned assassination of Adolf Hitler. However, by this time the British Government was only interested in an unconditional surrender from Germany, and was unwilling to enter into negotiations on any other matter. This was probably not helped by the fact that Bell was an outspoken opponent of the British policy of bombing civilian populations in Germany, which had made him suspect in the eyes of the Churchill government.

In January 1943, Bonhoeffer became engaged to Maria von Wedemeyer, the granddaughter of Ruth von Kleist-Retzow, although this does not been a love match so much as a way of assuring the continued support of the noblewoman. At the time of the engagement Bonhoeffer was 36-years-old, while von Wedemeyer was only 18, and they did not meet again after the celebration, with Bonhoffer citing the war as a reason not to marry soon. 

Bonhoeffer and von Dohnayi continued to be involved with efforts to smuggle Jews and other dissidents out of Germany, and von Dohnayi additionally became involved with Henning von Tresckow's failed attempt to assassinate Hitler in February 1943. In April 1943 the Gestapo uncovered evidence of von Dohnayi's involvement in the aiding of Jews to escape to Switzerland, and he, Christine, and Bonhoeffer were all arrested, although Christel was later released. 

While both men should in theory have been quickly brought to trial, proceedings were held up by military judge Karl Sack, another member of the resistance, and Bonhoeffer spent the next year-and-a-half in Tegel Prison, where he ministered to both prisoners and guards (one of whom is claimed to have offered to help him escape, though Bonhoeffer reputedly refused).

In February 1944, acting on the advice of Heinrich Himmler, Hitler disbanded the Abwehr, and placed its head, Admiral Wilhelm Canaris, under house arrest. A subsequent investigation into the organisation revealed diaries kept by Canaris, linking the organisation to a number of plots. Confronted with this evidence Hitler is reported to have flown into a rage and ordered the execution of all Abwehr members.

Bonhoeffer was taken from Tegel Prison and brought before SS judge Otto Thorbeck, who convicted Bonhoeffer and sentenced him to death at a trial with no evidence, witnesses, or defence. He was taken to the Flossenbürg concentration camp, where he was executed on 9 April 1945 alongside Admiral Canaris, General Hans Oster, General Karl Sack, Theodor Strünck; and Ludwig Gehre. Von Donayi was executed the same day at the Sachsenhausen camp.

A doctor at the Flossenburg camp, Hermann Fischer-Hüllstrung, recorded that Bonhoeffer knelt before the gallows and prayed, before going calmly to his fate. However, later accounts by inmates of the camp contradicted that, suggesting that Bonhoeffer may have died in a more brutal and protracted fashion, with Bonhoeffer being repeatedly hung until nearly dead, then taken down, given time to recover, then hung again. His body was never recovered, and is presumed to have been either incinerated or thrown in one of the mass graves at the camp.

Dietrich Bonhoeffer is today recognised as a martyr by the Methodist Church and some Anglican congregations. The anniversary of his death is marked by a number of protestant christian denominations. The German church in Sydenham was bombed during the war, but was rebuilt after and reconsecrated under the name Dietrich Bonhoeffer Kirche. Many of Bonhoeffer's writings are still considered important works of theology, particularly those on the importance of the church remaining separate from, and able to remain critical of, the state. A poem by Bonhoeffer, Von guten Mächten, was set to music by Siegfried Fietz in 1970, and voted Germany's most popular hymn in 2021.

See also...

The first Americans.

For much of the second half of the twentieth century, a single model of the peopling of the Americas was accepted by the vast majority of the archaeological community. This was that at the end of the Pleistocene, the receding North American icecap allowed a group of people living in an area called Beringia, a land bridge which connected Alaska to the northeastern tip of Asia. These people, the Clovis Culture, brought with them a suite of tools including a distinctive projectile tip, the Clovis point, taken as an indicator they used spears and bows to hunt. They expanded rapidly across the Americas, reaching the southern tip of South America in less than a thousand years, and driving much of the megafauna of the Americas extinct in the process. All subsequent Americans, until the arrival of Europeans in the 1490s, were descended from this population.

A selection of Clovis points in the collection of the Cleveland Museum of Natural History. Tim Evanson/Wikimedia Commons.

There have been four main objections raised to this theory.

The first, and most obvious, of this is that many sites in the Americas appear to be older than the first Clovis occupation. These include sites such as Tanana and Nenanan valleys in Alaska, the Manis Mastodon site in Washington State, Paisley Caves in Oregon, the Channel Islands of California, the White Sands National Park site in New Mexico, the Topper site in South Carolina, the Saltville site in Virginia, the Buttermilk Creek site in Texas Tlapacoya in Mexico, the El Abra and Tibitó sites in Colombia, the Monte Verde and Tagua Tagua sites in Chile, the Pedera Funda and Lapa do Boquete sites in Brazil.

However, many of these sites were uncertain in their dating, for example radiocarbon dates from remains which appear to be associated with tools, but which cannot be conclusively linked. Other sites have not yielded tools or Human remains as such, but rather Animal remains which appear to show signs of butchering by Humans, leaving room for alternative interpretations. One of the most convincing sites is Buttermilk Creek in Texas. Here tools belonging to the non-Clovis Western Stemmed Tradition, and are found within a layer directly overlain by a layer containing Clovis tools. The Western Stemmed Tradition is found at a number of other early sites, and has been suggested to represent a widespread pre-Clovis tradition in North America. However, while this culture is considered separate from Clovis, the two are clearly closely related. Thus the Western Stemmed Tradition might represent a slightly group of people closely related to the Clovis people, who entered North America slightly earlier, or such a people who entered at the same time but reached some areas first.

The second objection is that the Clovis people appear to have spread across the continents of the Americas incredibly fast, far faster than Humans appear to have colonised any other landmass. This has been raised in particular with reference to sites in southern Chile, which appear to be close in age, if not actually older than, the first Clovis sites in North America.

The third objection is that some of the earliest archaeological sites from South America have produced tool sets conceptually entirely different to the Clovis Technology, which is to say, the tools produced were made in a way so different that it seems unlikely that the producers had any knowledge of the Clovis manufacturing system. Notably, the Umbu, Itaparica, and Lagoa Santa stone tool traditions of Brazil were identified by Brazilian archaeologist Astolfo Araujo as being not only entirely conceptually different from Clovis, but entirely different from one-another. Furthermore, these cultures apparently continued to make entirely different sets of tools, having no influence upon one-another, despite living alongside one-another for thousands of years. However, none of the sites associated with these three cultures pre-dates the Clovis sites, rather their cultural uniqueness appeared to derive from an unknown earlier wave of settlers, which itself has left no trace.

Selected archaeological sites related to the eastern South America Paleoindian Traditions. Lagoa Santa: (1) Lapa do Santo, Boleiras and Taquaraçu; (2) Santana do Riacho; (3) Lapa Pequena; (4) BA-RC-28; (5) Abrigo do Pilão. Itaparica: (6) Gruta do Gentio II; (7) Lapa do Varal; (8) GO-JA-01; (9) MT-GU-01; (10) Lapa do Dragão; (11) Lapa do Boquete; (12) Furna do Estrago; (13) Pedra Furada (São Raimundo Nonato area); (14) Lajeado. Umbu: (15) PR-FI-124; (16) PR-FI-138; (17) Capelinha; (18) RS-C-43 and RS-S-327; (19) RS-I-69. Araujo (2015).

The final challenge to the Clovis-first Hypothesis came from the morphometric examination of ancient remains. Morphometric analysis is a tool used by palaeontologists, archaeologists, anthropologists and forensic pathologists to analyse and compare specimens. It relies on taking numerous measurements of an object such as a bone or shell, and comparing both these measurements and ratios between measurements to those obtained from other specimens in order to establish relationships between them. Traditionally these measurements have been obtained using tape measures and calipers, but modern scientists often use more sophisticated tools such as structured light scanners, which are capable of building highly detailed three dimensional models of specimens. 

Between 1989 and 1991 archaeologists Walter Neves and Hector Pucciarelli published a series of papers in which they suggested that, based upon morphometric examinations of their skulls, many sets of ancient individuals from South America appeared to be more closely related to modern Austronesians than to modern Native Americans or Northeast Asians. These remains, which included crania from sites associated with the Lagoa Santa culture, they identified as 'Palaeoamericans' to differentiate them from 'Palaeoindians' the term usually given to the most ancient Humans in the Americas, and which by extension are considered the ancestors of modern Native Americans.

This was controversial for a number of reasons. Firstly, while morphometric analysis is generally considered to be a reliable method of determining the relationships between species, it is less reliable in judging the difference between different groups of Modern Humans, where variation within populations is often as great as that between them. Attempts at applying morphometric analysis to Modern Human remains have frequently been linked to attempts by 'scientific racists' (a group who could be politely described as pseudoscientists) to prove that some groups of living Humans are somehow 'superior' to others.

Secondly, such studies rely on studying preserved skulls in museum collections. Many such skulls were acquired in the eighteenth, nineteenth, and twentieth centuries under what would now be considered highly dubious circumstances, robbed from graves, or taken from executed criminals or prisoners of war (the execution of several people for stealing bodies from graves to sell to medical schools in eighteenth century Europe and the United States suggests that this was never thought to be particularly ethical). Such skulls often had (and in many cases still have) living relatives who objected to their being held in museum collections rather than being buried properly. 

Finally, many Native American populations are now marginalised in the Americas, having largely been displaced by the activities of European colonial powers and their successor states. Against this background, communities in many areas have managed to gain some protection, on the basis that they are the original inhabitants of the land. Any suggestion that this is not the case can potentially threaten such protections, leaving Native Americans open to the accusation that they are just one group in a long succession of different settlers.

Walter Neves, with Luzia, a skull from Lagua Santa, which is the oldest cranium discovered in the Americas to date. The skull was thought to be lost following a fire at the National Museum of Brazil in 2018, although fragments of it were subsequently recovered. piauí.

Despite these controversies, Walter Neves and his team continued with this research, adding more crania from South, Central, and even North America to their list of 'Palaeoamerican' skulls. In 2001, American archaeologist James Chatters published a book 'Ancient encounters: Kennewick Man and the first Americans' in which he assigned a 'Palaeoamerican' origin to Kennewick Man.

Kennewick Man (sometimes known as 'Ancient One') was a partial skeleton already surrounded by controversy. The skull of Kennewick Man was discovered by two college students in shallow sediment in the Columbia River in Washington State in 1996. Not unreasonably, they passed the skull to the local police. A subsequent search recovered much of the rest of the skeleton. The Benton County Coroner, responsible for the area where the remains were found, surmised that the remains were not recent and passed them to Chatters, who at that time ran an independent archaeological consultancy, for examination. 

Chatters initial diagnosis of the remains caused the initial controversy, since he concluded upon radiocarbon evidence that Kennewick Man was more than 9000 years old, and upon morphometric analysis of the skull that he was 'Caucasoid' - a term which did not exactly correspond to either 'European' or 'White' - but which had pretty clear implications. By convention, Native American remains discovered on federal lands in the US should be returned to the tribe to which they belong, for internment as they see fit. However, if Kennewick Man was more than 9000 years old, then he could not clearly be determined to belong to any modern Native American group, and the diagnosis of 'Caucasoid' implied that he was not Native American at all, and by implication that Native Americans were not the first people in the Americas.

This led a collection of Native American groups headed by the Umatilla Tribe, who live in the area and have an oral history which they assert goes back 10 000 years, to launch a legal bid to recover the remains of Kennewick Man. This was supported by the them President of the United States, Bill Clinton, and the US Army Corps of Engineers, who had nominal responsibility for the area where the remains were found. A counter case was brought by a group of anthropologists led by Robson Bonnichsen of the Center for the Study of the First Americans, who reasoned that the nature of the Kennewick Man's remains was so significant that they should be retained for study by science. In the event, on 4 February 2004, the United States Court of Appeals for the Ninth Circuit concluded that the remains should not be handed to the Umatilla or any other tribe, on the basis that kinship could not be established. The court further found that the United States Government had acted in bad faith in supporting the case, and awarded US$2 739 000 in costs to the anthropologists. A subsequent attempt in 2005 by Senator John McCain to amend the law on Native American remains to allow the return of the skeleton also failed.

The skeleton of Kennewick Man. Chip Clark/Smithsonian Institution.

Chatters' description of Kennewick Man as 'Palaeoamerican' did not follow Neve's description as a member of an Austronesian-related group, but rather proposed a mixture of European, Ainu (from northern Japan), Asia, Polynesian, and Australian features. If proposing that a cranium belongs to an ethnic group on the basis of morphometric analysis alone is problematic, the proposal of such a complex mixture should probably have been rejected out of hand. Nevertheless, this was taken quite seriously at the time, and discussions about Kennewick Man's possible affinities continued for several years.

In a paper published in the journal Nature on 18 June 2015, a team of scientists led by Morten Rasmussen of the Centre for GeoGenetics at the University of Copenhagen, and the Department of Genetics at Stanford University, presented the results of a study which compared the genome of Kennewick Man to those of a variety of modern populations. This study found that Kennewick Man was of unequivocal Native American affinities, and was most closely related to the Confederated Tribes of the Colville Reservation, one of the groups which had previously tried to claim his remains as an ancestor. The United States Senate subsequently passed legislation allowing the remains to be returned to a coalition of Columbia Basin tribes, and they were subsequently reburied at a secret location. 

On 21 August 2015 another paper was published in the journal Science, by a group of scientists led by Maanasa Raghavan, then also of the Centre for GeoGenetics at the University of Copenhagen, and including Morten Rasmussen as one of the contributors. This paper sought to examine the wider origin of Native American peoples by sequencing the genomes of ancient individuals from the Americas and living individuals from 28 Native American and Siberian communities, which were then compared to a wider database of Human genomes from 169 populations around the globe. 

Raghaven et al. found that all Native Americans, with the exception of the Inuit, formed a single clade (group defined by a common ancestry), which could be divided into a northern group, comprising Athabascans (speakers of languages belonging to the Athabascan language group, which have sometimes been suggested to be a separate group from other Native Americans) plus some other groups from northwest North America), and a southern group, comprising all other Native Americans from elsewhere in North, Central, and South America. 

The Inuit were found to belong to a sister clade which also included the Koryak and Yupik peoples of Siberia. Interestingly, both the Inuit and Yapik appeared to be equally closely related to a 4000-year-old individual from the ancient Saqqaq culture of Greenland, suggesting that they might represent a back-migration from North America into northeastern Asia. All Native American, Inuit, Yapik, Saqqaq, and Koryak peoples were calculated to have had a last common ancestor who lived about 20 000 years ago (around the last glacial maximum), and a last common ancestor with the Nivkh people of Sakhalin Island and the Amur River basin as well as the Han Chinese about 23 000 years ago.

The last common ancestor of the northern and southern Native American groups was calculated to have lived about 13 000 years ago, and while whether this happened in Beringia or North America is unclear, Raghaven et al. believe that North America is the more likely region, as the southern group were found to be more closely related to the Anzick-1 child, who lived about 12 600 years ago in central Montana, and who was buried with a number of tools associated with the Clovis industry. Several ancient individuals from North America, including Kennewick Man, were found to be closely related to modern peoples living in the same area, showing a remarkable level of genetic continuity across much of the continent. No evidence of early European populations contributing to the Native American gene pool was found.

Curiously, however, Raghaven et al. did find a faint trace of Austronesian affinities among some Native American populations, including Aleutian Islanders, Athabascans, and the Surui people of Brazil. Despite the earlier controversies, this was not entirely improbable; the ancestors of modern Austronesians are known to have been present in East Asia during the Late Pleistocene and Early Holocene, and it is not impossible that an Austronesian-related people, or a people containing some admixture of Austronesian and Siberian genes, could have reached the Americas.

Origins and population history of Native Americans. (A) The results show that the ancestors of all present-day Native Americans, including Amerindians and Athabascans, derived from a single migration wave into the Americas (purple), separate from the Inuit (green). This migration from East Asia occurred no earlier than 23 000 years ago and is in agreement with archaeological evidence from sites such as Monte Verde. A split between the northern and southern branches of Native Americans occurred about 13 000 years ago, with the former comprising Athabascans and northern Amerindians and the latter consisting of Amerindians in southern North America and Central and South America, including the Anzick-1 individual. There is an admixture signal between Inuit and Athabascans as well as some northern Amerindians (yellowline); however, the gene flow direction is unresolved because of the complexity of the admixture events. Additionally, a weak signal related to Australo-Melanesians can be seen in some Native Americans, which may have been mediated through East Asians and Aleutian Islanders (yellow arrows). Also shown is the Mal’ta gene flow into Native American ancestors some 23 000 years ago (yellow arrow). It is currently not possible to ascertain the exact geographical locations of the depicted events; hence, the positioning of the arrows should not be considered a reflection of these (B) Admixture plot created on the basis of TreeMix results shows that all Native Americans form a clade, separate from the Inuit, with gene flow between some Native Americans and the North American Arctic. The number of genome-sequenced individuals included in the analysis is shown in brackets. Raghaven et al. (2015).

What is unclear is when such a population could have arrived. It is possible that such a population reached the Americas some time before the ancestors of modern Native Americans, but only survived and contributed to later genomes in a few places. It is also possible that such a population could have entered the Americas at the same time as other Native Americans, although why they appear to have interbred with a few widely dispersed populations before disappearing is unclear. It is also possible that all of the earliest Native American arrivals had a proportion of Austronesian ancestry, but that the genetic traces of this have been lost in most subsequent populations. Finally, it is possible that such a population entered the Americas later than other Native Americans, possibly through the Aleutian Islands, though it is unclear how they could have spread through an already inhabited Americas contributing to the gene pools of only a few widely scattered populations.

In order to try to test this hypothesis, Raghaven et al. carried out a morphometric analysis of a series of crania from ancient populations previously identified by Walter Neves and others as being of Palaeoamerican affinities, resembling Austronesians. This included samples from the ancient Pericúes people of Baja California, the Fuego-Patagonians of southern Chile and Argentina, and the ancient Lagoa Santa people of Brazil. However, they were unable to repeat the earlier results, finding that these people were not apparently morphologically different from other Native Americans.

On 8 November 2018, a group of scientists led by Víctor Moreno-Mayar, again of the Centre for GeoGenetics at the University of Copenhagen, published another paper in the journal Science, which sought to understand the rate at which the earliest ancestors of modern Native Americans spread through the Americas. In order to do this they used genome data from 15 ancient individuals from the Americas, as well as modern individuals from indigenous communities. 

Moreno-Mayar et al. found the same early divide into Northern Native American and Southern Native American populations observed by Raghaven et al., although two of the oldest individuals in their study USR1, a female child from the Upward Sun River site in the Tanana River Valley of Alaska dated to 11 500 years before the present, and Trail Creek 2, a deciduous tooth from the Trail Creek Cave site on the Seward Peninsula dated to about 9000 years before the present, were found to form an outgroup to both of these despite being younger than the division between the two, suggesting that the Ancient Beringian population from which both were descended persisted in Alaska at this time. This supports the idea that the split between the Northern Native American and Southern Native American lineages occurred after the ancestors of these peoples had migrated south of Alaska. This also suggests that the Athabascan and Inuit populations of Alaska, who are members of the Northern Native American group and an outgroup to all Ancient Beringian and Native American populations respectively, moved into the region some time after 9000 years ago.

The split between the Northern Native American and Southern Native American populations was estimated to have happened between 17 500 and 14 600 years ago by Moreno-Mayar et al. The 12 600-year old Anzick-1 child from Montana, the Spirit Cave Individual from Nevada, dated to 10 700 years ago, and five individuals from Lagoa Santa dated to between 10 400 and 9800 years before the present. Two of the Lagoa Santa individuals belong to the same female haplogroup as Anzick-1 (determined from mitochondrial DNA, which is found in the mitochondria, and is passed directly from mother to child without being sexually recombined each generation), while three belong to the same male haplogroup as Spirit Cave (determined from Y-chromosome DNA, which is passed from father to son without recombination), suggesting that all of these individuals were closely related, confirming the extremely fast distribution of this group across the Americas. 

Surprisingly, the Lagoa Santa individuals were found to be more closely related to the Spirit Cave individual than were the modern Mixe people, who live in the eastern highlands of the state of Oaxaca State, Mexico. Moreno-Mayar et al. calculate that this is because, while the Mixe belong to the Southern Native American Group and show clear affinities to the Lagoa Santa group, they have also received a large genetic influx from a group they describe as Unknown Population A. This group was found to have diverged from the common ancestors of Ancient Beringians, Northern Native Americans, and Southern Native Americans, between 30 000 and 22 000 years before the present, around the time that these groups split from Siberians and East Asians. Moreno-Mayar et al. estimate that the Mixe are the result of a Southern Native American group interbreeding with Unknown Population A around 8700 years ago, and that they derive about 11% of their genetic heritage from this group.

The Anzick-1 and Spirit Cave individuals are thought to have shared a last common ancestor with the Lagoa Santa individuals and modern Mixe people who lived around 14 100 years ago, while the last common ancestor of the Lagoa Santa individuals and Mixe people is thought to have lived around 13 900 years ago, again supporting a very rapid dispersal of these groups across the Americas.

Moreno-Mayar et al. note that both the Spirit Cave individual and the Lagoa Santa individuals have been identified as 'Palaeoamericans' with apparent morphological similarities to Austronesians, and that some present day groups living in the Amazon region have been shown to have some Austronesian ancestry (although these groups have not been subjected to morphometric analysis). They found that the Lagoa Santa individuals did show a proportion of their genetic heritage with the modern Suruí people and Austronesians, and that this genetic heritage was not shared with the Mixe or Huichol peoples of Mexico, nor the Spirit Cave individual. 

Moreno-Mayar et al. also observe that many modern South American populations appear to have derived a significant part of their genetic heritage from a later influx from Mesoamerica, which shared the admixture of genes from Unknown Population A seen in the Mixe. Many modern populations show descent from both the migration which produced the Lagoa Santa individuals and the group ancestral to the modern Mixe. Notably, evidence of an Austronesian input only appears to be present in individuals from east of the Andes. Some North American populations also show signs of an influx of genetic material from Mesoamerica, although this appears to be more recent.

Thus, Moreno-Mayar et al.'s findings appear to support the presence of an Austronesian-related population in South America in the Early Holocene, although this appears to have been largely swamped by subsequent influxes of migrants belonging to different Southern Native American groups. However, a subsequent paper published in the journal Cell on 15 November 2018, by a team led by Cosimo Posth of the Department of Archaeogenetics at the Max Planck Institute for the Science of Human History, and the Institute for Archaeological Sciences, Archaeo- and Palaeogenetics at the University of Tübingen, which included a greater number of ancient genomes than previous studies came to a rather different conclusion. 

The new individuals included in the study included a 10 900-year-old individual from Los Rieles in Chile, two individuals from Belize dated to 9300 and 7400 years before the present, and individuals from the 9600-year-old Lapa do Santo site (associated with the Lagoa Santa culture) and the 6700-year-old Laranjal site (associated with the pottery-producing Koriabo culture) in Brazil, none of which appeared to be particularly closely related to modern individuals living in the same region. 

Also included were individuals from Cuncaicha and Lauricoch in Peruvian Andes, which despite being around 9000-years old, did appear to be directly related to modern individuals living in the same area. Individuals from Arroyo Seco in Argentina and Laguna Chica in Chile, both dated to around 8600 years before the present. The 5800-year-old Moraes individual, and individuals from the 2000-year-old Jabuticabeira 2 site in Brazil do show affinities with modern Brazilians.

Posth et al. note that many of the earliest individuals in South America, including those from Los Rieles in Chile and Lapa do Santo in Brazil, show close affinities with the Clovis Culture Anzick-1 individual from Montana, again supporting the rapid spread of this lineage, although this close relationship largely disappears from later populations. 

Posth et al. conclude that all Native American populations in South America, living and historic, are descended from four waves of migrants, all of which belong to the Southern Native American group. The first of these appears to have diverged from the main part of that lineage before Anzick-1, and therefore may-or-may-not have been associated with the Clovis Culture. The second has direct affinities to Anzick-1, and therefore can be associated with the Clovis Culture; this population appears to have reached the southern part of South America soon after the earliest sites associated with that culture in North America. The third group appears to be related to ancient individuals from the Californian Channel Islands, and to have reached the Central Andes by about 4200 years ago. The fourth group appears to have contributed to modern populations in the Amazon region; it is this population which other researchers have identified as having Austronesian affinities, however, Posth et al. disagree with this analysis.

By using both a larger set of ancient individuals and a wider coverage of the genome, Posthe et al. conclude that the 'Austronesian' influence found in many American groups is in fact a relic of ancient diversity found in the earliest Native Americans and Ancient Beringians, and that this has simply disappeared from most modern populations. This explains the apparently random distribution of these alleles (gene variants) in modern and ancient populations, without the need to invoke an ancient migration of Austronesian peoples into the Americas. 

There remains a considerable debate about the oldest archaeological sites in the Americas. It remains possible that one or more groups may have entered the Americas long before the arrival of modern Native American groups, and that that people may have had affinities to Austronesians, Siberians, East Asians, or other groups living in East Asia in the Late Pleistocene. There is, however, no evidence that such a population contributed to the genetic makeup of modern Native Americans. 

The Clovis Culture appeared among Southern Native Americans after they had entered North America, and rapidly expanded, reaching the southern part of South America within 2000 years. It was never, however, the only Native American culture in the Americas, and it is not therefore surprising to find evidence of other cultures preceding it in some areas.

See also...