The maps on this blog illustrate the locations of Male Y-DNA Haplogroups passed from father to son. It can be viewed as a map of conquest. Human groups have always been in conflict, especially as weapon technology improved and animal predators were not so successful in limiting human population growth. Agriculture greatly increased human population which led to expansions - conquests.
Many of the Y-DNA Haplogroup areas are probably associated with improved weapon technologies or social organization. The first group of men who invented the sling, or spear thrower, or bow and arrow, or musket would have been able to conquer all their neighbors, replacing the males in these areas.
The advent of agriculture would have modified this pattern. Among hunter gatherers there was no reason to let any of the males they conquered live. After agriculture was implemented the conquering group would leave the conquered males alive to grow products to enrich the conquering group.
The map below shows the distribution of the male Y-DNA C3 Haplogroup. People with this haplogroup clearly came from Asia and judging from the map, was a later migration into the new world and did not go further south, blocked by earlier migrants to the new world.
The map below shows the distribution of the male Y DNA R-1 Haplogroup passed from father to son.
Most sources contend that the "R" came about in Native Americans recently from post Columbian American colonists. But the concentration of R in northeast North America seems too high for that. And there is little reason to think that it would be much higher in northeast North America than in other parts of North and South America. Central and South America have had long post Columbian histories of intermarriage but R M-173 barely shows up there. And the R M-173 in North America is substantially different form the R-1b found in Europe.
The map below is interesting. It shows the world location of of people with Denisova alleles. The first DNA from the Desinova caves found n 2009 in Siberia indicated a primitive long extinct human sub species. We know very little about the Desinovans. But comparing their DNA with modern people indicate that they have contributed up to 5 percent of the genome in parts of southeast Asia, Australia, and New Guinea. The map also shows that the people in north central South America also have Desinovan DNA
Look at the concentration in the north central part of South America. The map looks like a migration by sea from Oceania. The alternative explanation is that the migration came from Siberia over the land bridge but let little trace in North Asia and North America.
The map below shows the current location of Y DNA Haplogroups.
All of the maps are taken from Wikapedia. Thanks, Wikapedia. Great job.