The military historian Gwynne Dyer doesn’t find the fact that the two superpowers soured toward each other surprising at all. He likens it to earlier geopolitical rivalries and argues that the democracy-versus-communism Cold War dynamic was a lot like the role religion played in the wars of the sixteenth and seventeenth centuries. “Each side has an ideologically watertight explanation for why the adversary behaves with such persistent wickedness and aggression,” Dyer writes. “None of the post-1945 developments would seem surprising to a 17th century Spanish or Ottoman diplomat. Neither
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