Erik Olin Wright was an American analytical Marxist sociologist, specializing in social stratification, and in egalitarian alternative futures to capitalism. He was the (2012) President of the American Sociological Association. Erik Olin Wright received two BAs (from Harvard College in 1968, and from Balliol College in 1970), and the PhD from University of California, Berkeley, in 1976. Since that time, he has been a professor of sociology at University of Wisconsin - Madison. Wright has been described as an "influential new left theorist." His work is concerned mainly with the study of social classes, and in particular with the task of providing an update to and elaboration of the Marxist concept of class, in order to enable Marxist and non-Marxist researchers alike to use 'class' to explain and predict people's material interests, lived experiences, living conditions, incomes, organizational capacities and willingness to engage in collective action, political leanings, etc. In addition, he has attempted to develop class categories that would allow researchers to compare and contrast the class structures and dynamics of different advanced capitalist and 'post-capitalist' societies.