Randall Collins is an American sociologist who has been influential in both his teaching and writing. He has taught in many notable universities around the world and his academic works have been translated into various languages. Collins is currently Emeritus Professor of Sociology at the University of Pennsylvania. He is a leading contemporary social theorist whose areas of expertise include the macro-historical sociology of political and economic change; micro-sociology, including face-to-face interaction; and the sociology of intellectuals and social conflict. He is considered to be one of the leading non-Marxist conflict theorists in the United States, and served as the president of the American Sociological Association from 2010 to 2011.