If lifespans are extended significantly in the future… say, as the title suggests, by a couple hundred years — or even a measly extra century — I think it’s highly likely that as demographics shift towards a preponderance of people over a century old the perception of youth as flighty will… stretch a bit.
Writers under a century old being seen as shallow by default, for example.
Maybe the drinking age will be raised, too.
You might wait until you’re 30 to vote. Or 50. Even 100. In favor of the youth vote? Well, that might be beside the point when 3/4 of the population is over 100 years old.
I’d imagine it would only be a matter of time before various nations amended their constitutions to increase minimum ages for various offices.
If you were 150 years old, would you trust a callow 35 year old to be president?
I can’t imagine I would.
Longevity treatments would probably be a way bigger agent of social change than depicted in most science fiction.
Give it some thought. Really, do. The possibilities are fascinating, and not just because I’d love to live to 200. Or 2000. Wouldn’t say no to 20,000 either.