We pretend that success is exclusively a matter of individual merit. But there's nothing in any of the histories we've looked at so far to suggest things are that simple. These are stories, instead, about people who were given a special opportunity to work really hard and seized it, and who happened to come of age at a time when that extraordinary effort was rewarded by the rest of society. Their success was not just of their own making. It was a product of the world in which they grew up.