[stefco_]

That's a fair point, but you can also flip it the other way: someone with 5 years left on Earth might be much more interested in improving things for future generations. Thinking about how your impact will live on after your death is an enduring human strategy for dealing with the terror of impending nonexistence. Another way to flip it: someone who's 40 has plenty of time left to live hedonistically without having to face really long-term consequences of their actions.

It's also worth noting that short-vs-long-term planning is just a paradigm for thinking about your politics; in practice, absolutely horrible things can arise from both strategies. Long-term thinking can manifest as clinging to tradition (since you now feel ownership over future generations and want to impose your own world-views on them). It can manifest as early optimization. Both of these things can be good (maintaining culinary/aesthetic culture, infrastructure investment) or bad (maintaining brutal and oppressive traditions, prematurely and hence inefficiently optimizing things at tremendous economic/social cost).

I'm not saying the status quo is anywhere near optimal. I think it's a very interesting (read: hard) and probably culturally-dependent question of what age groups are able to minimize the societal happiness cost function (and of what that cost function even is). It's incredibly difficult to say anything generally meaningful about how you might do this well. The one-person-one-vote system is at least a simple solution that seems acceptable to most, which is an important feature (not that each person's vote counts the same in practice in USA, but that's a whole other problem).

[darkpuma]

The assumption that age comes with wisdom is a gross oversimplification. Age is strongly correlated with dementia. Rather than they elderly having greater than normal lucidity, they often lack it, sometimes completely.

We don't let teenagers vote because they're known for being hotheads, but when an 90 year old man forgets the names of his children, we still let him vote. That's nuts, and it shows that what we have right now is not a 1-person-1-vote system. We already have a system of selective enfranchisement, but it's not been configured in a rational way. It's not been configured in a way designed to give good results. In fact, it's proven itself quite harmful. Go ask any climate scientist what our future on this current trajectory looks like. Trying to stay the course is suicide.

[AnimalMuppet]

> That's nuts, and it shows that what we have right now is not a 1-person-1-vote system.

How does that show any such thing? Unless you're defining someone with dementia as "not a person".

> Go ask any climate scientist what our future on this current trajectory looks like. Trying to stay the course is suicide.

Ah. You're against old people voting because they don't vote the way you want on your hot-button issue. And you're willing to sacrifice the right to vote on the altar of climate change. No thanks. (But it makes me wonder what else you're willing to sacrifice there...)

[darkpuma]

> "How does that show any such thing? Unless you're defining someone with dementia as "not a person"."

Are 17 year old people "not persons"? Of course not. Who is talking about non-personhood?

We currently forbid 17 year olds from voting (while allowing them to sign up for the military..) but where are the objections when a 75 year old with dementia and the mentality of a 5 year old votes? The 17 year old is unquestionably more qualified to vote than a senile pensioner who thinks Jimmy Carter is still in office and forgets to walk to the bathroom when nature calls. That's the case even if you disregard the "skin in the game" argument, or even if you somehow convince yourself that democracy is more important than bracing humanity for catastrophic climate change.

[AnimalMuppet]

Ah, I now understand your argument. Well, if you want senile people prohibited from voting, then do it on the basis of senility, not on the basis of age. My mother is 91, and she's as qualified to vote as you are.

But if you want old people disqualified because you don't like the way they vote, get lost.