The term diversity has become a euphemism for racial balancing. It is usually applied when minorities are underrepresented, and you will rarely see it discussed when minorities are overrepresented. A recent example of this concerns college football.
According to the Rivals100 list published by Sports Illustrated, the top 100 football recruits this year consists of 85 African Americans, 14 Anglos, and one California kid (Viane Talamaivao) who is either Pacific Islander or Hispanic. This contrasts with America’s population of 13% African-Americans, 63% Anglos, and 15% Hispanic, 5% Asian, and 0% Pacific Islander.
Nature vs. nurture? That’s a subject for another day.