Mr. Epstein’s vision reflected his longstanding fascination with what has become known as transhumanism: the science of improving the human population through technologies like genetic engineering and artificial intelligence. Critics have likened transhumanism to a modern-day version of eugenics, the discredited field of improving the human race through controlled breeding.

Mr. Epstein, the accused sex trafficker, was fascinated by eugenics. He told scientists and others of his vision of using his New Mexico ranch to impregnate women.