Complex sentence: Within cross-cultural psychology his writings have dealt mainly with varying cultural conceptions of race, the race-IQ debate, and Brazil; and he was a Fulbright Scholar in Brazil and China.
Split into simpler sentences: Within cross-cultural psychology his writings have dealt mainly with comparing and contrasting the race concept in a variety of cultures, the race-IQ debate, and Brazil. Fish was a Fulbright Scholar in Brazil and China.