[shmoopi]

>Letting everyone do things in their own self interest, unchecked

As in "freedom"?

>is rarely found in stable societies

As in most of the developed world?

[nomel]

"unchecked"

I'm sorry, but you don't have complete "freedom" to achieve your own self interests. I once knew someone who was very interested in a car stereo. Unfortunately for him, but fortunately for others who happened to own car stereos, that car stereo was in a car that belong to the police, and he definitely saw an even larger reduction in "freedom" after that.