Humans first evovled in the African continent. Various sub species and races evolved indepedently. Some of this populations migrated to europe. The population which migrated to europe is very less. So, in europe due to the continuous inbreeding, the genetic diversity is less compared to that of the people who remained in Africa. Solution Humans first evovled in the African continent. Various sub species and races evolved indepedently. Some of this populations migrated to europe. The population which migrated to europe is very less. So, in europe due to the continuous inbreeding, the genetic diversity is less compared to that of the people who remained in Africa..