According to The American Kennel Club, approximately one Dalmatian in every litter (one out of six) is born deaf. The reason: inbreeding.
According to The Endangered Wildlife Trust, the African cheetah is near extinction. The reason: inbreeding.
According to The Challenger Launch Decision: Risky Technology, Culture, and Deviance at NASA, by Diane Vaughn, the Challenger disaster was preventable. The reason the disaster happened: management failed to listen to differing opinions. “It was not amorally calculating managers violating rules that were responsible for the tragedy. It was conformity” (page 386).
Intellectual inbreeding causes as many problems as genetic inbreeding. Different ideas are not insubordinate ideas. Diversity adds strength.