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A book by Volodymyr Viatrovych, a historian whose research interests include the Ukrainian resistance movement. "Notes of a non-combatant," as he calls them, are 45 chapters, 45 vital lessons of history that we must learn in order to defend the independence and very existence of the state of Ukraine.

These are 45 important issues that concern everyone, and the lives of Ukrainians depend on their resolution. History is a strict teacher who repeats unlearned lessons to inattentive students.