In late 1991, the Soviet Union dissolved into its component republics. The Iron Curtain was lifted and the Cold War: Part One came to an end.
We will have to leave it to historians to decide when precisely the Cold War: Part Two began but the clash over Syria suggests that we are already in the middle of it. China and Russia are on one side and the West and much of the Arab world on the other.
We won’t forget to let you know when – and how – it ends.