Truman’s record now speaks for itself. His legacy, the Pax Americana also known as the Long Peace, has prevented a general war for three generations, the length of living human memory. Some will say his achievement was accidental. By contrast the man who now promises a world without nuclear weapons — his synonym for peace — has only just embarked on his plan.

It has been far from auspicious; according to a former secretary of defense the world is today closer to a nuclear conflict than at any time since the height of the Cold War. From the South China Sea to Ukraine, to the Middle East, the shadow of war is everywhere one looks. Perhaps one should give it time, as socialism and other sure-fire schemes should be given time, and we will not be disappointed.

It is ironic to consider that today’s generation perhaps has more blind faith than the men who 70 years ago defeated Hitler and Tojo. Moderns know what’s going to happen much more than people in the past. They read it in a book. They saw it on social media. They know it will be specified in talking points memos. We forget sometimes that by contrast the World War 2 generation had no certitude of triumph. They did not even know the Atomic Bomb was going to work or that they would perfect it before Hitler did. They could not have seen it as evil with the same retrospective certainty that Obama can. At each step of the way these young men won victory — can the word still be used without embarrassment? — with none of the certainty which today’s generation possess in such abundance.