Elon Musk reveals 3 existential threats he's scared of, including a declining birthrate, religious extremism, and 'artificial intelligence going wrong'

Tesla CEO Elon Musk revealed three "existential threats" he believes currently face humanity during a recent interview with Mathias Döpfner, the CEO of Insider's parent company, Axel Springer. The richest man in the world said he fears religious extremism, a declining birthrate, and "artificial intelligence going wrong." Death, however, did not make his list. "I spent a lot of time talking about the birthrate thing," Musk said. "That might be the single biggest threat to the future of human civilization."