Living creatures want to expand. They want to grow. They—we—are made that way. Why do we even have things like eyes, ears, hands? Because back when we were just lumps, we wanted to expand. We wanted to see farther, hear more, reach out. Trees put out branches, and branches put out leaves. Kitties grow into cats, and then they puff themselves up to look way bigger if they need to. And if, sooner or later, we reach our growth potential, then we start looking for other ways to grow. Smarter. Stronger. Nicer. Richer. It’s simply not in our nature to stop where we are and say, “That’s fine. I’m good.”