> If we’re dreaming big, let’s forget the wimpy solar energy constraints and adopt fusion. The abundance of deuterium in ordinary water would allow us to have a seemingly inexhaustible source of energy right here on Earth. We won’t go into a detailed analysis of this path, because we don’t have to. The merciless growth illustrated above means that in 1400 years from now, any source of energy we harness would have to outshine the sun.

Let’s worry about that in 1400 years. _If_ we make it that far. As things stand we may not have to worry about it at all because we wont.

Some people believe they have inherited the stars, that God is behind all things, and that we’re not going to just grow too fast like a cancer and then kill the planet.

I’m one of those people, so this argument doesn’t work for me. There indeed appears to be a slowing of global population growth and an abundance of headroom to grow further.