To the man with a hammer, the world looks like a nail

“You must know the big ideas in the big disciplines and use them routinely-all of them, not just a few. Most people are trained in one model-economics, for example-and try to solve all problems in one way. You know the old saying: ‘To the man with a hammer, the world looks like a nail.’ This is a dumb way of handling problems.”

– Poor Charlie’s almanack, Charles Munger