If the whole process of learning from failure means discarding stuff that's not working, but in fact, our natural reaction is to keep going, to throw more money behind it, to throw more emotional energy behind it... that's a real problem.

Bill Phillips was this nervous, chain-smoking student. He had signed up to be an engineer, he had gone away to fight in the Second World War, he had come back. He had switched to sociology because he wanted to understand how people could do these terrible things to each other. And he did a little bit of economics on the side.

Funnily enough, the Federal Reserve produced comics about monetary policy, and there is a good comic book guide to microeconomics and macroeconomics out there. But it is not really appropriate for younger readers; it is really aimed at economics students.

It's difficult because we tend to overrate the pain of failure. We fear it too much. That's research that emerges from psychology. We think it's going to be worse than it really is. And, I think, as we get a bit older, really after we leave school or college, we quickly stop experimenting.