I like your thought but Yugoslavia is (I think) a bad example for this. (I came from there)<p>There was no religious or ethnical union, of that I am 100% sure, and I&#x27;m also not convinced of nationalism there.<p>The unifying ideology was socialism&#x2F;communism.<p>It is understandable why this did work so well in a country with no clear religious or ethnic majority because it tends to flat out deny any ethnic&#x2F;cultural differences and restrict religions and places instead the socialist ideal in the center. (all are equal)<p>Once nationalism was on the rise it was the end of Yugoslavia. Now in place of being a socialist comrade everyone was either Serb, Croat, Bosnian and so on and demanded their own state.