A rising tide raises all boats. But not everybody believes that. Many believe that the only way to thrive is to take from other people rather than to trade or cooperate with them. The world this philosophy builds has far fewer boats in it, and a lot more people on rickety rafts desperately trying to escape. It also has fewer people, since taking lives is often part of taking riches. Hundreds of millions of people have died in the parts of the world ruled by takers in the last century, even as the rising tide built more boats than the rest of the world had ever seen in recorded history. Many of us live in a world of limitless possibilities, and others live in a world separated from it by razor wire fences and armed guards. The longer that continues, the more friction it causes, and the more opportunities we will all have to lose the rising tide.