An Atlantic classic, Albert Einstein’s 1947 article on the atomic bomb where he proposes a world government, an idea with some currency at the time:
I do not hide from myself the great difficulties of establishing a world government, either a beginning without Russia or one with Russia. I am aware of the risks. Since I should not wish it to be permissible for any country that has joined the supranational organization to secede, one of these risks is possible civil war. But I also believe that world government is certain to come in time, and that the question is how much it is to be permitted to cost. It will come, I believe, even if there is another world war, though after such a war, if it is won, it would be world government established by the victor, resting on the victor’s military power, and thus to be maintained permanently only through the permanent militarization of the human race.
On a related note, also from the archives, here’s a first-hand account of the bombing at Hiroshima.
The Dish 