Kennedy argues that the destructive capacity of nuclear weapons had fundamentally altered the logic of warfare between major powers. When opposing states possess nuclear forces capable of surviving an initial attack and retaliating, neither side can confidently expect to achieve a conventional victory without risking catastrophic destruction in return.

In his American University address, Kennedy uses this reasoning to support a more restrained approach to Cold War rivalry. His comparison with the entire Allied air campaign of the Second World War emphasises the unprecedented destructive power concentrated in individual nuclear weapons. The quotation therefore challenges older ideas of total war, in which military victory could still produce a meaningful political outcome. In the nuclear age, Kennedy argues, escalation between great powers could impose losses so severe that victory itself would cease to offer a rational objective.