This is true, the orgins of humanity would definitely be better suited for an MD thread or something.
So yes, I'd suggest related topics be moved to a new thread. In the meantime Jeff Bezos is calling he wants you all to go subscribe to Amazon Prime promptly! (:
I think idealistically the only way to fix this would be to find a way to replicate things like food and clean water somehow. The next step would be finding other places to populate because Earth would only have so much room, once these problems have been solved then anti-aging could be...