Diversity refers to racial, religious, cultural, and other "diversity" being increasingly promoted within a single society. Racial diversity is the blending of many ethnic backgrounds, and is used to justify the practice of affirmative action. "Diversity" is also used as an excuse for the promotion or toleration of abnormal sexual practices, and for the redefinition of marriage away from the traditional definition of one man, one woman. "Diversity hiring" is also a currently fashionable business buzzword. Many times, it is used under leftist politics, especially in the aforementioned usages of affirmative action and redefining marriage.
Atheism and diversity
See also: Atheism and diversity
As far as the issue of diversity within the atheist population, compared to Christianity, atheism has a significantly less degree of cultural/geographic, racial, gender and personal wealth diversity (see: Atheism and diversity).