O nuclear weapons lead to peace or to war?

This essay must look at the question from the perspective of security studies.
The argument should compare Cold War and post Cold War period and weather or not nuclear weapons deter war. The argument should lean towards that nuclear weapons tend to prevent the break out the war on the massive scale use contemporary examples of international relations and examples during the Cold War.
Use some Hobbesian examples of security and war deterants. Other ideas are also welcome

Referencing Requirements:
Barry Buzan and Lene Hansen, a?Strategic Studies, Deterrence, and the Cold Wara, in The Evolution of International Security Studies (Cambridge et al.: Cambridge University Press, 2009), 66-100.

Kenneth N. Waltz, a?Nuclear Myths and Political Realitiesa?, American Political Science Review, 84:3 (1990), 731-745.

Waltz and Art, The Use of Force (older editions, e.g. 1988)
a? Joseph Nye and Sean Lynn-Jones, a?International Security Studies: a Report of a Conference on the State of the Fielda?, International Security, 12:4 (1988), 5-27.
a? Richard Ullman, a?Redefining Securitya?, International Security, 1983, 8, pp.129-153
a? Robert Schuett, a?Peace through Transformation? Political Realism and the Progressivism of National Securitya?, International Relations, 25:2 (2011), 185-203

a? John J. Mearsheimer, The Tragedy of Great Power Politics (New York: W.W. Norton & CO, 2001).

a? Robert Jervis, a?The Political Effects of Nuclear Weapons: A Commenta?, International Security, 13:2 (1988).

Other souces are welcome as London as the above ones have been included.