Climate change will not really impact most of us alive today.
This is why it has been so hard to get people to make real changes, spend real money reducing our footprint. A lot of people just don't care because they will be dead and gone when the real trouble starts.
Climate change is already effecting millions of people worldwide in drastic, life-changing ways, and those effects will only increase over current lifetimes even under the most aggressive plausible decarbonization scenarios.
Sure, let's nuke the whole world and get rid of the human species to save the environment! What a wonderful take.
Furthermore, is there any sensible, hopeful, safe, stable, productive, and generally happy society that has mass shootings and addictions/crimes of despair nearly everyday?
And the grim prediction is rather than climate change, the real problem is population growth.
Population growth is not a massive problem: we already know that human population will hit a max of 10 billion people and from there start aging progressively and reduce over time.
This is the finest kind of denialism, and it is really going to bite us hard in about a hundred years at most.
There isn't any first-world country with the number and frequencies of mass shootings or gun-related homicides the US does. 2/3 of gun deaths are suicides, which are a bigger problem of preventable acts of despair. Murder is entirely different. 54% of mass shooting are family-related. Roughly 40000 gun deaths in the US per year.
Comparing with other countries is ridiculous at best when not nonsensical. No country enables citizens to purchase weapons like in the US and no other country has hundreds of millions of weapons in circulation. Trying to make it look like a single variable problem is a joke.
Reducing the number of humans is not the same thing as extinction. Your argumentation is lacking.
Also, taxes and pensions are very small problems compared to uninhabitable coastal regions, mass migrations and food shortages that climate change predictions show us.
Age pyramid? That's not the biggest issue in China's demographics: it's the sex ratio. Talking vague FUD about China isn't helpful and doesn't contribute to this discussion.
Mass migrations and food shortages are happening now, but not as bad as they will be. This is due to both climate and US Monroe doctrine meddling (crime caused by the War on Drugs and installation of right-wing leaders with death squads).
I'm pretty sure that's because of Missing women of China[1], not necessarily the one child policy.
[1] See https://en.wikipedia.org/wiki/Sex-selective_abortion#China and the other linked articles.
https://e360.yale.edu/features/as-disease-ravages-coral-reef...