> If you read more carefully, I am concerned by two things. A reduction to 0, and the lack of control over this. I think you need to drop back to reality to re

> If you read more carefully, I am concerned by two things. A reduction to 0, and the lack of control over this. I think you need to drop back to reality to reassess your concerns. Barring a major disaster, there is no risk of extinction. Population decline is a factor only in economic terms, as demographics alone will require a significant chunk of a nation's productivity potential to sustain people who left the workforce. However, countries like the US saw it's population double in only two or three generations, and people in the 50s weren't exactly fending off extinction.