Why I'm not a terrorist

[The Grand Nudger]

No; I mean the deep, dark and twisted kind of grudge, resulting from organized continues acts.
Religion has its resulting grudges, nationalism has its resulting grudges, and pretty much every other faction on earth has its own dark arts of organized steps to manufacture hate and grudge; protected and kept by the institution that controls the faction; usually.
What existed in tribal societies was mere "hate". Not "organized grudges" with roots striking back to thousands of years and require years-worth of work combined with societal rebuilding and re-drawing of culture.
To think about an example; think of the kings and nobles of Medieval Europe. An organized marriage would end a 100 years war and grudge.
Take the modern world's racism between whites and blacks.

All grudges are deep and dark and twisted.  That what makes them grudges.  Yes, what existed in tribal societies, was multi generational organized grudges.  The first wars that we know of -were- multi generational organized grudges.  

Ofc, for a medeival despot, interbreeding could be a bargaining chip.  They engaged in conflict in order to possess.  A marriage was another way to gain a stake in possession.  

The modern worlds racism is a good example of such a grudge, and ancient peoples were often more xenophobic than moderns.  That's one thing we've been getting better at, slowly. 

Intervention; Invasion; what's the difference?

If you can't tell the difference between a peace keeper and an invader you've been spending too much time in the wrong kind of mosque.  

But humans literally solved all the reasons of wars in the past. With the discovery of energy sources, transporting food and even water became so easy. If every wealthy person gave a dollar a day, nobody on earth would die from hunger. Medicine is also there.

It doesn't matter how much the wealthy have, or whether or not food or water are easy to transport, or whether medicine exists.  People fight for access to these things, not for their mere existence.  These, ofc, are only the tangibles. People also fight for the intangibles. The value of the love for their child and it;s retributive price (as in our earlier example), or the desire to be meaningfully free and enfranchised within ones home, as another salient example.

The predictability of conflict, is due to bad intentions already being held in place.
Honestly; don't you feel the hypocrisy showering the place, when two asses wearing fancy suites shake hands with a smile, while aiming nuclear ICBMs at each others' capital cities?

If the only reason you can think of for the predictabilty of human conflict is "bad intentions", I don't think you'll ever really understand human conflict.  You always end up saying something silly and chasing it with how it;s the great satans fault.  

Bad intentions are what I call that. We can be better people, but the majority insist on bringing hammers to the table.

It's not a nations job to be paragons of virtue.  That is left to citizens.  Nations, at least conceptually, pursue the interest of the state.  It is in the best interest of a state to be capable of defending itself against foreign and domestic enemies.  Often enough, it's when that ability fails, and particularly when the domestic end fails..that third party military forces arrive. 

"Wouldn't it be nice if this would all just go away, we could just stop".  Well, no, we couldn;t.  We could do  (and would have to do) many things to make any dream of the end of human conflict a reality..and some if it would likely be engaging in human conflict. What can we say; this place wasn't purpose built for us, the vast majority of it is uninhabitable, resources are not evenly distributed where it is habitable, and wealth is not inherently virtuous within favorable geography that is productive.

It's a massive subject, but it could probably be distilled to a single observation. Conflict arises out of disparity..real or imagined. The imaginary great satan shit that's an article of your faith has been the cause of a great deal of conflict, just as our own largess has, point of fact.