The atomic bomb was not merely a new weapon; it was a new dimension of military and political power. Each in its turn, steel and gunpowder and aircraft had gradually changed war and society. In a single day the atomic bomb made a bigger change than any of them. Its blast hit every war office and chancellery on earth.

Treaties, boundaries, alliances, the charter of the new United Nations, the foreign and domestic policies of states—all are affected by estimates of the relative strengths of the nations. Now, all the estimates had to be recalculated.

New Weapon. TNT is barely twice...

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