John Uzo Ogbu (May 9, 1939 – August 20, 2003) was a Nigerian-American anthropologist and professor known for his theories on observed phenomena involving race and intelligence, especially how race and ethnic differences played out in educational and economic achievement. He suggested that being a "caste-like minority" affects motivation and achievement, depressing IQ scores. He also concluded that some students did poorly because high achievement was considered "acting white" among their peers. Ogbu was also involved in the 1996 controversy surrounding the use of African American Vernacular English in public schools in Oakland, California. The 2000 book Eminent Educators: Studies in Intellectual Influence focused on him as one of "four intellectual giants of the 20th century."