In "Capitalism, Socialism and Democracy" (1942), Joseph Schumpeter developed the concept out of a careful reading of Marx's thought (to which the whole of Part I of the book is devoted), arguing (in Part II) that the creative-destructive forces unleashed by capitalism would eventually lead to its demise as a system (see below). Despite this, the term subsequently gained popularity within mainstream economics as a description of processes such as downsizing in order to increase the efficiency and dynamism of a company. The Marxian usage has, however, been retained and further developed in the work of social scientists such as David Harvey, Marshall Berman, Manuel Castells and Daniele Archibugi.