What are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? What are the strengths and weaknesses of each method?

Answer 1

You are going to need to do research. I suggest you start with http://news.bbc.co.uk/2/hi/in_depth/8302140.stm since it is in the news.

I suppose you will have to define "peace" also.