Patrick O'Sullivan is an Irish-British scholar and author of works in the field of Military geography.
In his book Geopolitics (1986), O'Sullivan makes a geographically-based case against the proliferation of nuclear weapons during the Cold War, arguing that nuclear weapons pose a threat primarily because they reduce the significance of both physical distance and national borders, which would otherwise function as deterrents to the likelihood of direct military engagement.
[citation needed] O'Sullivan has also written on the social scientific study of railway transportation in Britain as well as an autoethnographic Cultural Geography essay discussing the relevance of expatriate identity.
[citation needed] In 1994 he began teaching at Florida State University.
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