Shan States link, following up on Larry's post.
Tough to know what to do - sit back and you seem callous (e.g. Rwanda), step in an you look like bullies (e.g. Somalia and Iraq). No win in most cases. Failed nation states are the biggest unsolved problems of global governance and security. That it is in the interests of some governments (e.g. that of China) to sustain broken governments in other countries makes it much harder or impossible to come to consensus solutions. Iraq highlights the perils of attempting to take over governance of another country - especially when you have no plan for how to manage said country. Burma would be much worse, I suspect.