In our global, multicultural world, how we understand and relate to those who are different from us has become central to the politics of immigration in western societies. Who we are and how we perceive ourselves is closely associated with those who are different and strange. This book explores the pivotal role played by 'the stranger' in social theory, examining the different conceptualisations of the stranger found in the social sciences and shedding light on the ways in which these discourses can contribute to an analysis of cross-cultural interaction and cultural hybridity. Engaging with the work of Simmel, Park and Bauman and arguing for the need for greater theoretical clarity, Theories of the Stranger connects conceptual questions with debates surrounding identity politics, multiculturalism, online ethnicities and cross-cultural dialogue. As such, this rigorous, conceptual re-examination of the stranger will appeal to scholars across the social sciences with interests in social theory and the theoretical foundations of discourses relating to migration, cosmopolitanism, globalisation and multiculturalism.