An idea walks into a bar. She meets another idea. They get together, and nine months later (or maybe it's nine minutes or seconds? It's not clear how it works with ideas), a new idea is born. A baby idea with the best traits of both parents. When this happens a lot, everyone gets smarter and the world gets better. "It's a weird concept," writes John Stossel, "but the more I think about it, the more right it seems. I learned it from British journalist Matt Ridley, a recent guest on my Fox Business show."