The modern idea of diversity is less diverse than the ancient ecumenical idea of eccumene. The classic concept of eccumene. (universal, the whole world) spans many generations—even milleninia—while the modern idea of diversity spans but a single century (or more likely only a slice of that – one generation, or one subset of on generation, such as a particular coterie of youth culture). A point I wish I had thought of, myself. Modern diversity is an ahistorical humanism.