Embourgeoisement is the theory that posits the migration of individuals into the bourgeoisie as a result of their own efforts or collective action, such as that taken by unions in the United States and elsewhere in the 1930s to the 1960s[citation needed] that established middle class-status for factory workers and others that would not have been considered middle class by their employments. This process allowed increasing numbers of what might traditionally be classified as working-class people to assume the lifestyle and individualistic values of the so-called middle classes and hence reject commitment to collective social and economic goals. The opposite process is proletarianization. Sociologist John Goldthorpe disputed the embourgeoisement thesis in 1967. [1]