[Sorry this took me so long. This is only part one. The cites follow in part 2.]
The Middle East is probably the most violence-prone region on Earth (though, at this particular moment, thankfully not actually the most violent). Although WWI&II, the organized repression of Fascism and COmmunism, and the tribal flare-ups of Africa are certainly violent and did more damage, the first were all primarily caused by political actors; sans a small political group which promoted, created the conditions for, and believed they would benefit from war and repression, it would not have happened. Tribal warfare, as seen in Africa, is less damaging and rarely creates the kind of mass-death or deportation conditions. It is primarily a form of raiding, not war as such. The Middle may be unique in combining the two, and in doing so in both the modern world and the ancient.
The Middle East so violence-prone because of the failure of any one power or powers to establish and maintain a long-term dominance, either culturally, politically, or militarily. In other locations around the world, conflicts do not tend to go on forever. This has been precisely the experience of the Middle East. Indeed, several conflicts present before the Roman Empire conquered it are still ongoing.
Part of the cause is the Assyrian-caused dispora (see other post for cite), which forced numerous groups to spread into area controlled by others. This may have brought groups into conflict with one another, but even without that, it tended to make them relatively “immortal” by introducing redundancy.
Compare this to other regions of the world: Europe, despite being organized by and for a warrior elite from the fall of Rome almost to the Industrial revolution, has seena trend towards fewer, better organized, and “politer” (more distinction between civlian and non-civilian, and more rights granted to POW’s and so forth) wars, even during the heyday of the feudal period. Chivalry, though sometimes ignored, was nevertheless a real factor in behavior.
The United States fought a near-constant battle with Native Americans from before it even was the United States until around 1900. The conflict consumed a subtantial portion of the attention of our national leaders. Today, however, there are a great number of Native Americans and the wars are almost forgotten. The idea of having a war between “whites” and “Indians” is ridiculous.
Witness China. China has the dirty little secret that it isn’t one homogenous mass; there are a great many ethnic minorities, quite a few of which live in the poor sections. And that discounts those which are not even considered Chinese by the Party, like Tibetans, the native inhabitants of Xinjiang, and Koreans in Manchuria. Nevertheless, these groups don’t go to war with each other, however much they might like it. The Men of Han won, and that’s unlikely to change anytime soon.
And that’s what’s so unusual about the Middle East: without any lack of viciousness, depravity, or ill-feeling, they nevertheless failed to bring violence to a close, either through superior firepower, cultural dominance, or political quietude. And because of that, because they did not agree to disagree peacefully, and because they chose not to create either wholly inclusive or exclsuive state actors, they remain trapped in violence.
A note about Islam is probably warranted here. Islam, per se, is not actually the problem (though several problems past and present were and are linked to Islam). Rather, Islam tended to encourage existing problems in the long (but not short) haul. One event which happened repeatedly in Middle Eastern history is that a band of barbarians - the Turks in Anatolia, nomadic Arabs several times, or whatever - convert to Islam, and begin to conquer a wealthier and more settled society. Generally speaking, the rulers of said society were more tolerant, cosmopolitan, and educated. It may well be that absent this force, the Middle East might have stabilized under several powers. I don’t usually like to play the what-if game, but this observation bears directly on my argument.
[Actually, I agree with your Bosnia argument. That’s exactly like what I’m talking about. The Middle East isn’t the only such place in the world; but it is the most notable and most consistent, IMHO.]