It's interesting, but doesn't cover the points I'm most concerned about - within a century, it's likely this will become a problem, birth/death have to be regulated. And given not everyone is rational... How do we do it? Cost, promising not to have kids, or what?

Also, I agree that the human mind might not function at optimum efficiency that long. It's a side point, and can probably be fixed, but... We're NOT adapted to live more than a few millenia at best. Maybe even a few centuries. Though this is only speculation.