Just think what life was like in the early days and how it is now. From small tribes fighting each other, to smaller kingdoms, then nations, now groups of nations. There is a progression. England and France were enemies right up to a few years before the First World War, now it is unthinkable that we would take up arms against them.
I think wars will end soon. Weapons have become so devastating and it is getting harder to kill your 'enemy' without harming yourself and the environment. Before too long everyone will see that it is better to sort out problems by talking - look at Syria, we have actually got Iran, Russia, Arabs, and the USA talking and more or less agreeing with each other. They may not become bosom buddies for a long time yet but it is progress.
If not, then maybe a threat from outer space will have the effect of knocking our heads together so that we will all recognise that we are all one family sharing the same one planet and (those who believe in Him), worship the same God whatever name they use for Him.
