Answer:
The answer is Richard Lewontin.
Explanation:
Richard Lewontin is an American evolutionary biologist who's findings regarding race and genetics have set a landmark in understanding human differences. He studied the differences among races by studying the variation in protein types in blood, in this study he found that there was only 15% of variation across races.
According to Lewontin, from a genetic point of view, human populations are very similar to each other; this argument defied the notion of "biological race" and set a precedent for the study of race as a social construct.