What is the cause of Civilization unraveling worldwide Starting with Trump?

 I would say there are two major factors here:

1. World Wide Panic over Global Warming.

2. Also related to global Warming worldwide migration in order to survive Global warming.

Basically if your crops fail and you are a farmer and your neighbors depend upon those crops then those people are going to move so they don't starve to death. If the government fails because Farmers crops fail and those farmers cannot pay taxes because they had to migrate to somewhere else then those in the government of that country will have to migrate to somewhere else too where they can survive.

So, when governments fail because of Crop failures lawlessness tends to set in around the world.

But, Trump is a direct reaction to worldwide panic over the potential end of the status quo for everyone.

People just are not going to stay where they are mostly on earth because they can no longer survive many places anymore.

So, it's either move to someplace better or die?

So, people will move and this is causing and will cause instability in larger more developed nations around the world. 

This is all inevitable.

The only question is? How will the world react to so many people dying everywhere?

This is the real question one must ask now.

People are going to move to survive.

So, what are the people going to do who live where they go to?