[edblarney]

"Any tips for reading up on how different communities can learn to coexist peacefully?"

A) Balance of power (roughly equal in strength)

B) Mutual dependence (trade)

C) Some degree of truthfulness and transparency (i.e. freedom of information, speech, free press, institutions with integrity)

Nations co-exist peacefully in a dynamic equilibrium. When that equilibrium is shifted (one weak, one strong i.e. power vacuum) - this creates conflict.

This is why 'peacekeeping' as envisioned by the UN largely failed. A bunch of lightly-armed 'blue helmets' effectively does nothing to remedy the underlying causes driving conflict.