>The notion that we should be colonizing mars because of global warming is the stupidest thing I've ever read or heard.

Yeah, because that's a strawman you imagined in your head. I'm not sure what gave you the impression that the two were related (other than that they're competing options) based on my previous comment.

> Yeah, because that's a strawman you imagined in your head.

I've read enough of that argument being made in earnest on this forum that I'm going to have to go with the parent poster.

There are many intelligent people who seriously believe in that strawman. (Although it's also possible that they don't actually believe in it, and are just making the argument because the purpose of colonizing Mars isn't increasing the resilience of Earth, but getting away from the hoi polloi. Those people will be for a rude surprise when they discover that they are also part of the hoi polloi.)

Someone posted it upthread. You can replace any catastrophic event with global warming and it's just as facially stupid. Literally like the thought process of a child. It's completely divorced from reality.

While I don't expect extinction from any particular given cause — and definitely not from any of global warming, nuclear war, loss of biodiversity, peak phosphorous, or the ozone layer — humans have a few massive failure modes:

1. We refuse to believe very bad scenarios until much too late. Doesn't need to be apocalyptic: The Titanic isn't sinking; all of Hiroshima must have gone silent because a telegraph cable was damaged and it can't possibly be the entire city destroyed, and even if it was the Americans can't possibly repeat it; the Cultural Revolution cannot fail; the King can't be executed for treason by his own parliament; the general can't cross the Rubicon; Brutus can't betray me.

I think many of those things would have been dismissed the way you're doing now.

2. Tech is changing. I don't expect extinction from a natural pandemic, but from an artificial one is plausible; not from a natural impact event, but artificial is… not yet, but no harder than creating a Mars colony; propaganda has already started multiple genocide attempts, what happens when two independent campaigns are started at the same time when both groups want to genocide everyone not in their group?

The same risks would still be present on Mars, and the only way I see around the deliberate impact risk is space habitats which have their own different set of problems (given we can't coordinate on greenhouse gases I see no chance of us coordinating on Kesler syndrome either in cis-Luna nor in Dyson swarm scenarios).

I don't have any solutions here, though.

My money is on the quiet failure mode. The demographic collapses we see happening around the world continue and spread as more people have the resources to live individually, without family. Through automation we overcome the economic issues caused by population inversion, leisure is the norm, ambitions are confined to personal goals, and the human species coasts comfortably down to nothing.

I think that direction will rapidly lead to people of the "Quiverfull" attitude (not necessarily literally in the Christian group of that name) becoming dominant.

> what happens when two independent campaigns are started at the same time when both groups want to genocide everyone not in their group?

In the awful real-world history of genocide, I don’t think “we want to genocide everyone except for ourselves” has ever actually happened. Genocide is always targeted against certain groups, with others left alone. I remember someone here saying that “Nazis wanted to kill all minorities”-but that’s historically false, we all know how they sought to exterminate some minorities, what is far less well-known is how they actually promoted and even improved the rights of others, which they saw much more favourably-such as Frisians and Bretons. “Let’s genocide everyone except for ourselves” is the kind of policy which cartoon Nazis would adopt but no one in the real-world ever has. I suppose something genuinely new could happen, but it doesn’t seem particularly likely-far less likely than the sad near-inevitability of future genocides (of the targeted kind with which we are familiar)

> The notion that we should be colonizing mars because of global warming is the stupidest thing I've ever read or heard.

Right, so you don't understand their arguments then, thanks for clearing that up. Global warming is only an additional reason, not the only or main reason.