Among distinguished sociologists, Harold Garfinkel was a Professor Emeritus at the University of California. Harold Garfinkel established and developed ethnomethodology as a field of inquiry in sociology. According to Harold Garfinkel 'The demonstrably rational properties of indexical expressions and indexical actions are an ongoing achievement of the organized activities of everyday life.' Harold Garfinkel analysed the methods used by people in everyday life to describe and make sense of their own activities.
Harold Garfinkell substituted phenomenon for principle, signaling a different approach to sociological inquiry. Seeing Sociologically and Toward a Sociological Theory of Information was written while Garfinkel was a student.