From what I hear, a lot of the internal conflicts in Ethiopia is fuelled by undercover Egyption influence, trying to increase the internal conflicts to weaken the country.
Maybe I've just been watching too much Caspian Report lately, and a lot of these issues are a century in the making, but damn if it doesn't feel like early WW2 issues arising along with the geopolitical implications of climate change.
My understanding is that economic interdependence deserves the bulk of the credit for this relative peace. Tying the economic prosperity of nations together makes it harder to rationalise physical conflict.
But perhaps we can also thank global communications for making it that little bit harder (though still by no means impossible) to sufficiently otherise far away populations.
the economic interdependence between industrial countries would be "the real guarantor of the good behavior of one state to another", as it meant that war would be economically harmful to all the countries involved.
The book was published, to great acclaim, in... 1909.
Oh, yes. I believe it was Francis Fukuyama who predicted that different regions of the world would specialize in producing specific products, trade would increase, and wars would decrease. Wars would decrease because of the DEPENDENCE of trade - BUT international sanctions would replace wars as the key piece to hold other countries in check.
We are seeing the US sanction other countries when they do things we don't like - and we are getting sanctioned in turn.
Take India-China. Those borderguards were literally fighting eachother with rocks and sticks because they don't issue guns to them PRECISELY to avoid war.
The primary issue of WW2 was an ascending, hyper-aggressive super-power-to-be that was assisted by a secret pact with the USSR. Had Poland not been stabbed in the back, the war would have gone on an entirely different course.
All of the conflicts that you listed are just run of the mill civil wars/border skirmishes/empires with rather limited pan-ethnic ambitions.
Morocco-westernSahara will not involve Algeria. The conflict is also basically resolved already with Morocco having successfully invaded/taken control of all but a very small part of Western Sahara.