Race: Genetic Aspects

Genetic research has shown that all individuals and populations are different, but no agreement has ever been reached on the number and definition of human races, with proposed races numbering from none to 200. Human genetic differences are patterned in geographical space, but each population harbors a large proportion of the species' diversity and shares with other populations most of its genetic variants. Race remains an important component of our social and psychological world, but envisaging humans as subdivided in genetically differentiated races leads to poor evolutionary inference and to errors in clinical practice.