Why are humans intelligent enough to send people to the moon, but seemingly unable to solve our problems here on Earth? Historian and bestselling author Yuval Noah Harari thinks he has the answer. He spoke to Matt Galloway about his new book Nexus — and how our information networks have both helped and hindered humanity, from the stone age to the dawn of AI. This is an extended podcast version of a conversation recorded in front of a live audience at the Toronto International Festival of Authors, and originally aired on CBC Radio’s The Current.