In sociology and criminology, strain theory states that social structures within society may pressure citizens to commit crime. Following on the work of Émile Durkheim, Strain Theories have been advanced by Robert King Merton (1957), Albert K. Cohen (1955), Richard Cloward and Lloyd Ohlin (1960), Neil Smelser (1963), Robert Agnew (1992), and Steven Messner and Richard Rosenfeld (1994).