Aristotle was an extraordinary thinker, perhaps the greatest in history. Yet he was preoccupied by an ordinary question: how to be happy. His deepest belief was that we can all be happy in a meaningful, sustained way – and he led by example. Life deals the same challenges in ancient Greece or the modern world. Aristotle’s way is not to apply rules, it’s about engaging with the texture of existence, and striding purposefully towards a life well lived. Chaired by Charlotte Higgins.