Tim Harford, who writes one of my favorite blogs, The Undercover Economist, speaks at TED about the merits of trial and error, the failures of the God complex, and the importance of making good mistakes. It seems so obvious when you listen to him, but it’s when you look around and see everyone trying to fix the world’s problems with their own preconceived master plans that you see how few people grasp the beautiful heuristic process of variation and selection.