Artificial intelligence (AI) is changing the world around us. From automated factories that build everything without human intervention, to computer systems capable of beating world masters at some of the most complex games, AI is powering our society into the future – but what happens when this artificial intelligence becomes greater than ours? Should we fear automated weapon turning on us, or Hollywood-style "skull-stomping robots"? We spoke to Max Tegmark, an MIT professor and co-founder of the Future of Life Institute, about his book, Life 3.0, in which he answers some of the key questions we need to solve to make the future of artificial intelligence one that benefits all of humankind. Can you describe your book in a nutshell?