Patrick O'Sullivan (author)

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Patrick O'Sullivan is an Irish-British scholar and author of works in the field of Military geography.^[1] His works include, The Geography of Warfare and The Geography of War in the Post-Cold War World.

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. He currently holds the status of professor emeritus. His academic writing focuses on regional geography and contains aspects of behavioral geography.^{[citation needed]}