Some AI entrepreneurs are flirting with the extinction of humankind as we know it. Sam Altman has invested in technology that aims to “upload consciousness” to a machine. Elon Musk is pursuing human “symbiosis” with artificial intelligence. Peter Thiel has hesitated when asked if he prefers the human race to endure. There’s a sentiment that underlies all this creepiness: transhumanism, or the belief that man and machine must merge into one to realize our full potential. Big Tech execs have