If the rewiring of the brain that yielded recursive generation of hierarchically structured expressions took place in an individual, not a group (and there seems to be no coherent alternative), then interaction must have been a later phenomenon.

As for organs, traits, etc., being "for" something, the notion may be a useful shorthand, but shouldn't be taken too seriously, if only because of the ubiquitous phenomenon of exaptation.

Some may remember, if you have good memories, that there used to be a concept in Anglo-American law called a presumption of innocence, innocent until proven guilty in a court of law. Now that's so deep in history that there's no point even bringing it up, but it did once exist.

That was the reason why very few people fleeing the rise of fascism in Europe, especially in Germany, could get to the United States. And there were famous incidents like with the MS Saint Louis, which brought a lot of immigrants, mostly Jewish, from Europe. It reached Cuba, with people expecting to be admitted to the United States from there. But the administration of Franklin D. Roosevelt wouldn't allow them in and they had to go back to Europe where many of them died in concentration camps.

Organization and education, when they interact with each other, they strengthen each other, they are mutually supportive.

Some international law specialists compare the invasion of Iraq to the 'crimes against the peace' for which Nazi leaders were indicted at Nuremberg.

[Mikhail] Gorbachev said that he would agree to the unification of Germany, and even adherence of Germany to NATO, which was quite a concession, if NATO didn't move to East Germany. And [George] Bush and [James] Baker promised verbally, that's critical, verbally that NATO would not expand "one inch to the east," which meant East Germany. Nobody was talking about anything farther at the time. They would not expand one inch to the east. Now that was a verbal promise. It was never written. NATO immediately expanded to East Germany.