Perhaps climate change is a crisis because it's clear there's no political will to deal with it in even an incremental fashion? The executive leaders of some countries, such as the usa, are even promoting the use of climate damaging outdated technologies like coal power plants.

1) There are other nuclear-armed countries that are a lot less stable than the US and Russia.

4) Unemployment means something different here.

In the United States, unemployment can very easily turn into living on the street with low chance of getting back into a home.

Look at the number of elderly people whose retirement plan has evolved into living in a van on BLM land. It's not pretty.