> Don't you support greater minority birth rates at the expense of the majority?

Frankly, I don't care what the relative birth rates are between "minorities" and "majorities." By the way, which metric are you using to define minority? Is it height? Nose size? Personality type? I'm guessing it's just race, which is a very narrow criteria, but that's the only the criteria respected by the modern definition of "diversity."

> No, that's philosophy.

Erm... no. Science can give us an explanation for what is causing climate change, and even how quickly climate change is occurring, but designing a solution to it is firmly in the domain of engineering.

Anyway, that's all semantics. As to how I came up with the "1" number is really pretty straightforward though. That number will prevent the population from growing or shrinking -- it will maintain the current number. Isn't that obvious?