I had little to do with the fall of the Berlin Wall 35 years ago. Like the billions who grew up with the monstrous structure, I thrilled to watch it get torn down by Germans on each side of it. And I celebrated the man responsible for the glorious sight, in journalism and fiction, although he was no longer President. Ronald Reagan brought down the Soviet Union with a singular vision which dispelled a 70-year-old belief — that the Cold War was the permanent status quo. He’d articulated it a decade earlier and shaken the world. “Here’s my strategy on...