Original sentence: Philippe Rushton in which he claims that race is a valid biological concept, and claims that racial differences are frequently arranged in a continuum of Mongoloids (Orientals, East Asians) at one extreme, Negroids (blacks, Africans) at the opposite extreme, and Caucasoids (whites, Europeans) in the middle.Rushton's study is focused on what he considers the three broadest racial groups, and his study is not concerned with smaller populations like the negritoes of South East Asia or Australian aboriginals.The book claims that Mongoloids average the highest IQ scores and greatest historical civilization (see race and intelligence), have the lowest crime rates, have the highest social organization, work hardest, are the least promiscuous, the least aggressive, the most introverted, have the largest brain size, lowest ratio of twins to births, the slowest maturation rates, greatest parental investment in child-rearing, the lowest rates of sexually transmitted diseases, the longest life span, the greatest mental stability, the least testosterone, the smallest penises, vaginas, and smallest secondary sexual characteristics like breasts and buttocks
Edited sentence: Philippe Rushton in which he draws attention to the existence of many racial differences, including behavioral ones, and shows that they are frequently arranged in a continuum of Mongoloids (Orientals, East Asians) at one extreme, Negroids (blacks, Africans) at the opposite extreme, and Caucasoids (whites, Europeans) in the middle.Rushton's study is focused on the three broadest racial groups, and his study is not concerned with smaller populations like the negritoes of South East Asia or Australian aboriginals.The book claims that of the three races it is concerned with (Negroids, Caucasoids, and Mongoloids), Mongoloids average the highest IQ scores and greatest historical civilization (see race and intelligence), have the lowest crime rates, have the highest social organization, work hardest, are the least promiscuous, the least aggressive, the most introverted, have the largest brain size, lowest ratio of twins to births, the slowest maturation rates, greatest parental investment in child-rearing, the lowest rates of sexually transmitted diseases, the longest life span, the greatest mental stability, the least testosterone, the smallest penises, vaginas, and smallest secondary sexual characteristics like breasts and buttocks