We talk about structural racism, but maybe prior to and upstream from that is "structural homophily" — the tendency of like to associate with like. That tendency, the degree to which it obtains, is obviously socially contingent. But our networks and algorithms are often designed according to a self-fulfilling that like prefers like. cf https://www.e-flux.com/architecture/are-friends-electric/289193/homophily-the-urban-history-of-an-algorithm/