Precisely the case.
All you have to do is get rid of religion and economics, and persuade women not to have more than one child.
Their grandchildren and subsequent generations will be able to live sustainably, with an increasing standard of living, and the human race will be able to survive the inevitable changes of climate for the next million years.
Not a bad legacy for doing nothing.
That's the exact thing we need to do. Why do people need more than one child? Is there any need?
We don't live in the middle ages, where you had to have more children to increase the probability that one of the heirs stay alive, while the other will die from any disease. People don't need many children to help them with hard work.
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