Here is another share of a segment of public relations history, social psychology, and propaganda. This idea of "diversity" to get away from a totalitarian "monolithic unity of group think" started in the early 1960s. The idea was to get away from controlled media by government overreach, yet that punted ball was returned right into our own end zone!
*Source: "PR!: A Social History of Spin" by Stuart Ewen (1996)