On a hot summer day last August, Svetlana Tikhanovskaya was pacing up and down her empty apartment in Minsk, the capital of Belarus in Central Europe, her life—and her country—in turmoil. With her husband in jail, she had sent her two small children out of the country, to safety, and she now faced a stark choice, bluntly handed to her by the nation’s hard-line security forces: flee into exile herself, or face arrest.