Here’s a succinct definition from economics Professor Thomas Sowell: it’s group quotas. Writing in National Review, he points out the subversive nature of this feel-good term, noting diversity benefits racial quotas, enforces bias and creates inequity:
In the early 20th century, the principle of geographic diversity was used to conceal bias against Jews in the admission of students to Harvard and other leading academic institutions.
Fast-forward to today. It is common, at colleges and universities across the country, for the test scores of Asian-American students who have been admitted to a given college to be higher than the test scores of whites or of blacks or of Hispanics. … In short, something very much like the quota limits that were applied to Jews in the past are now being applied to Asian Americans — and, once again, are being justified by diversity.
But what justifies diversity? Nothing but unsupported assertions, repeated endlessly, piously, and loudly. Today, as in the past, diversity is essentially a fancy word for group quotas. It is one of a number of wholly subjective criteria — such as “leadership” — used to admit students to colleges and universities according to their group membership, rather than according to their individual qualifications.