Key points at first. Nuclear weapons, if they are ever to be used, are unspeakable evil, but their existence saved the world during the Cold War and is saving it now as the previous two global systems—the bipolar one (which died, but there have been attempts to revive it) ...
... to mutual deterrence, although proving on practice the ability of nukes to prevent a conflict with undue risks is not so easy.
First, how can one find the causal relationship between absence of a world war during the past 70 years and possession of nuclear weapons by global powers? Was it the nuclear deterrent that has been restraining warmongering politicians itching to attack their opponents?
For example, the United States gave up the idea to nuke the Soviet Union in early 1950s in the meanest period of the Cold War when Moscow was short ...
... nuclear cruise missile.
Compared to these programmes however, the British situation is rather different. While other nuclear-armed states are investing heavily in modernising strategic forces, there is a growing public debate about the practicality of nuclear weapons in the UK. With a general election looming in two months’ time, a more visible discussion has emerged about whether the UK’s nuclear deterrent is affordable. Some minor political parties are even questioning whether it is necessary. With early polls suggesting that the result could be another coalition government, the deterrent has become a key policy issue.
D. Browne, I. Ivanov,...