But with each passing year and each new study, the evidence for the genetic contribution to individual and group differences becomes more firmly established than ever.

Formation of a new race takes place when, over several generations, individuals in one group reproduce more frequently among themselves than they do with individuals in other groups.

Of course, individuals vary greatly within each racial group and should be treated as such.

Race differences show up early in life.

Each race (or variety) is characterized by a more or less distinct combination of inherited morphological, behavioral, physiological traits.

On average, the Chinese, Koreans, and Japanese are more similar to each other and are different from Australians, Israelis and the Swedes, who in turn are similar to each other and are different from Nigerians, Kenyans, and Jamaicans.