[mc32]

I think one big problem I see is that there becomes no need for younger generations. It’ll all be old people. If you have low turnover then there is little change —society stagnates.

If people had discovered 3x lifespans and birth rates were thirded in the 1900s, we’d be living near-ossified lifestyles (and other things) from back then.

Also, the longer you live the more mental trauma there is to deal with. One lifetime is enough. As it is we have enough people who slowly decline and go crazy.

[jniedrauer]

A key dynamic shift that might offset this is that "old people" would suddenly have to plan for thousands of years. Many of the problems that generations currently solve are due to short-term thinking.

[mc32]

I think you’re being way optimistic. Longer lifespans means you can procrastinate and put things off even further.