The whole 20th century was total mess for Europe and the East. That there were no global wars after 2000 doesn't mean 21st century will be less horrible, given the amount of warfare present.

afaik, the number of wars are getting lower and lower. The same with really poor people.

Also, democracies are increasing in number, so there should be less wars -- the democratic peace theory seems to have good statistical support (see Wikipedia).

I hope you are right. But back in the days with never-ending wars there were never times like ours with the possibility to blow up the world in a go.

So, the wars get smaller but have bigger impact.