Despite the importance of the processes by which legitimacy barriers to the emergence of new industries are overcome, direct study of them has been largely absent from the literature. We develop and test a model of how capacities for social action are created and deployed to overcome cultural barriers to new industries. Specifically, we argue that the experience that firms gain in field-relevant activity as well as the development and concentration of ties among those firms generate capacities to overcome the barriers of cognitive and sociopolitical legitimacy. We support this argument empirically by linking measures of these factors with attention to and favorability assessments of the new industry.