All governments on earth are going to have a lot of trouble continuing to exist this century?

We are witnessing part of the reason right now. Inflation caused by Covid.

People who don't understand that the present inflation (which the U.S. is controlling better than almost any other country by the way through the FED) is directly caused by the deaths and injuries from Covid more than anything else.

However, global climate change combined with overpopulation and the mass extinction of many species also allowed Covid to develop in the first place. So, it is very very likely that many more pandemics of variations of Covid and other things will occur this century and further decemate human and animal populations all over the earth.

Then droughts and floods and rainstorms and other extreme weather events and earthquakes will also devastate all types of physical beings on earth as well.

So, everything human and everything wild will likely be reduced significantly by the end of this century and the next.

This is why all governments will also be struggling for survival as well.

I'm thinking that Democratic governments will tend to fare better than Dictatorships because at least the needs of more people are better served usually by Democracies than dictatorships.

However, there will also be pressure from all directions now to end democracies by various moneyed groups around the world. But, don't let them do it or we all go extinct this century!