And somewhere in the middle of all that, I arrived at a surprisingly comfortable conclusion, best expressed by that great sailor and underrated philosopher, a man whose entire health plan consisted of canned spinach: "I yam what I yam."

But I’ve always been an optimist. Not because I believe everything will turn out wonderfully. It might not. Humanity has demonstrated a remarkable ability to make a mess of things, often with considerable enthusiasm. Still, I remain optimistic. Why? Well, I’ve been thinking about that.