How do ideologies shape foreign policy? That is question Dr. Mark Haas examines in his new book The Clash of Ideologies: Middle Eastern Politics and American Security (Oxford University Press, 2012). The book analyzes how ideologies shape the perceptions and actions of governments, and specifically the impact this has on relations between the US and the Middle East. Dr. Haas examines two key variables, ideological distance and ideological polarity, using case studies on the Syrian-Iranian alliance, Iran’s ideological factions in the past decade, Turkey’s post-cold war foreign policies, and the US-Saudi relationship. The book not only analyzes the ways in which ideologies impact foreign policy, but also tries to provide ways for improving foreign policy decisions in the future by employing strategies that use ideological analysis.