In and after the 1950s, the term became associated with Austrian-American economist Joseph Schumpeter. Schumpeter is credited for making the theory popular. However, his idea of creative destruction was quite different from Marx's original theory. The term gained popularity within neoliberal or free-market economics where it is used to described processes such as downsizing. The original Marxist usage has, however, been maintained in the work of influential social scientists such as David Harvey, Marshall Berman, and Manuel Castells.