The civil wars in the former Soviet Union and Jugoslavia did not come on suddenly. In fact, the initial conflicts between groups were confined to political institutions. Immature legislatures in newly independent states struggled to deal with issues of language, citizenship, and the relative powers of central and local governments.
Nationalist demagogues on all sides fatally undermined the search for compromise, subverting public confidence in political institutions and allowing conflict to spill out into the streets. External states then threw gasoline on the smoldering civil conflict in pursuit of their own geopolitical objectives.
The parallels between those countries then and America now are greater than they seem. Strong institutions and norms against nationalist and racist political rhetoric take generations to build and constant effort to maintain, but can be eroded in a fraction of that time. And foreign interference no longer need take the form of provision of weapons and equipment to separatists.
FPRI.org.
There doesn't seem to be anything here yet