The images spread across social media and broadcast by television networks out of Eastern Europe have shocked and frightened many: columns of tanks stretching dozens of miles, burnt-out cars and craters marring city streets, men and women in civilian clothes crouched behind sandbags. It is not that the last decade has lacked conflict and war—from Syria to Myanmar to Ethiopia, unrest involving regional powers and complex geopolitical issues continue to affect tens of millions of people worldwide.

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