Complex sentence: George argued that the division between "black" and "white" races was founded on fundamental biological differences, and saved special venom for Franz Boas and the Boasian physical anthropologists who argued that race was of no biological consequence.
Split into simpler sentences: George argued that the division between Black and White races was founded on fundamental biological differences. He saved special venom for Franz Boas and the Boasian physical anthropologists who argued that race was of no biological consequence.