[sdeframond]

So an answer to the prisoner's dilemma would be a shared belief in doing good? Interesting.

[kakacik]

Western Europe (not only) social system is based on such belief. It kept working till a lot of immigrants from pretty bad corrupted countries came in, abusing the system in ways it wasn't planned for.

So it works, sometimes, on limited populations.

[ConradJarret]

It certainly helps when you all look alike and share other similar values.