Why can’t we get things done collectively? There are many reasons why our personal plans fall short. One common reason is that our plan is not well thought out. A cure for this is to collaborate with someone. “Two heads are better than one”, attributed to John Heywood in his Dialogue of proverbs (1546), is solid folk wisdom. For the bigger challenges of our time such as gun violence, ruining the planet, and chaotic and massive human migration, we need . . .