Poly-sci bullshit that any observant White person has known for decades. Human *breeds* are different just like a Border Collie is different from a hard headed gaze hound. "...People who identified as being from the same racial and ethnic groups had a number of genetic differences, the team found. In fact, "most genetic variance is within race and ethnicity groups rather than between groups," the study authors wrote in the report. Rather than sorting people into "distinct clusters" divided by racial and ethnic lines, the analyses found that people within different races and ethnicities show "gradients" of genetic variation. "We found gradients of genetic variation that cut across those categories," the authors wrote." Sheeit.