Steven Pinker shares why there is so much irrationality in the world – including conspiracy theories, and belief in fake news and medical quackery. Learn why he is optimistic about the future of democracy and the world, despite so much negativity and partisanship happening today. Steve is one of the world’s most renowned thinkers. He is a Harvard University psychology professor and author. Bill Gates called one of Steve’s  books his new favorite book of all time.His most recent book is Rationality: What It Is, Why It Seems Scarce, Why It Matters.