The traditional focus in organization theory on corporations as bounded, co
untable units of social structure is a poor fit with the emerging nature of
the new economy Increasingly 'boundaryless' production processes, and the
predominance of evaluative standards based in financial markets, undermine
the explanatory usefulness of theories such us resource dependence and popu
lation ecology. Yet economic theories of the firm are ill-equipped to make
sense of the social and political processes that shape the structure and ev
olution of the corporation. This chapter argues that social movement theory
provides an explanatory approach well-suited to forms of coordinated colle
ctive action in a post-industrial economy. We illustrate the argument by co
mparing the emerging media industry to the emergence of a national social m
ovement, and everyday workings of the network economy of Silicon Valley To
the routine mobilization of Local movement activity. We close by describing
four areas for future research.