"The widespread diffusion of nuclear weapons would make many nations able, and in some cases also create the pressure, to aggravate an on-going crisis, or even touch off a war between two other powers for purposes of their own"

This quote by Herman Kahn recommends that the proliferation of nuclear weapons might cause a hazardous scenario in which nations have the ability to use them to enhance their own interests. In other words, the existence of nuclear weapons could develop a scenario in which countries are able to use them to get an advantage in a dispute, and even to begin a war in between two other powers. This might result in a circumstance in which countries are most likely to utilize nuclear weapons to acquire an advantage in a conflict, or perhaps to start a war between two other powers. This might cause a situation in which nuclear weapons are utilized more regularly, and the repercussions of such use might be devastating. The quote likewise suggests that the presence of nuclear weapons might develop a situation in which countries are more likely to utilize them to get a benefit in a dispute, and even to start a war between two other powers. This could cause a situation in which nuclear weapons are used more regularly, and the effects of such usage could be catastrophic.