"However, we have essentially no evolution conducted in an environment where three hundred people have to get along with some sort of democratic government."
I don't understand what you are saying here. Where do you get three hundred people from?
That's why we vote for the rulers, in theory. If you are saying the problem is that government doesn't react to people as it should, or that the rulers don't represent the people, then on that we can agree. But it doesn't mean we totally abandon the system of government and hand the reins over to private enterprise.
There is another word for the cohesion you speak of. It's 'civilization'. You cannot have a civilized society without it. Otherwise everyone does what they want, inevitably stepping on the needs of others. This happens until there is nothing left, except for the most ruthless and sociopathic.
Right... so a government that turns the other way and allows a business (ie. warlord) to set up and do anything that that they want to profit. That's pretty much the government that people are calling for here. No taxi regulations, no building regulations.. Food can be prepared and packaged or served from kitchens that don't have to be kept clean and can have vermin running over your plate. Full service drug dealers on the corner, selling everything from Tylenol to heroin. They just want the government to stay out of everything. And soon we have the same kind of society as various African nations do.