Jim, you missed the point entirely. I am not necessarily advocating that we should or would even be able to accomplish such a thing as eliminating warfare from humans. My basic question was whether or not humans could ever trust each other enough to take any unilateral action that would leave them vulnerable. If my fantasy gene fix or magic potion would actually work, would anyone ever trust other humans on earth enough to go through with it? We would all suspect (with good reason, no doubt) other nations of secreting away an elite force that would then be able to dominate a world of pacified humans.
I believe that warfare is embedded deeply in human biology, and that some form of it will always exist. We are competitive creatures. Competition is generally good, but when the stakes become too high to allow failure or defeat, the competition becomes violent. Some cultures have learned to turn it into a ritual combat where only one or a few individuals get whacked, thereby sensibly saving the rest of society from wasteful destruction. That works pretty well when the warring societies are actually neighbors and even relatives, as in some stone age cultures in New Guinea. Our culture does it as well, but for lesser stakes. Team sports like football are nothing less than ritual warfare. Maybe our young men would be out raiding other towns for women and cattle(cars?) if there was no outlet for aggression in organized sports. That is indeed what they did before we were "civilized."
I don't think humans will ever eliminate war, we'll just learn to turn it into something else or control it some way, or alternatively, risk periodic total destruction. The current strategy of simple domination of everyone is impossible to accomplish, thereby providing eternal warfare.
Ironically, the Cold War policy of Mutually Assured Destruction has probably been the most effective means so far of preventing a major war, as well as us having the biggest, baddest and best equipped military