"Don't be reckless with other peoples hearts. And don't put up with people that are reckless with yours."

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The Soviet Union came apart along ethnic lines. The most important factor in this breakup was the disinclination of Slavic Ukraine to continue under a regime dominated by Slavic Russia. Yugoslavia came apart also, beginning with a brutal clash between Serbia and Croatia, here again 'nations' with only the smallest differences in genealogy; with, indeed, practically a common language. Ethnic conflict does not require great differences; small will do.

— Daniel Patrick Moynihan