ALMOST TWO DECADES AGO, IN THE SPRING OF 1989, COMMUNISM IN EUROPE died—collapsed, like a tent, itsmain post removed. The end was not brought by war or revolution. The end was exhaustion. A new political regime was born in its place across Central and Eastern Europe, the beginnings of a new political society. For constitutionalists (like me), this was a heady time. I had graduated from …