The past 50 years in the Gulf of Maine and Georges Bank is marked by a growing divide between fishermen, scientists, and managers. This paper tracks the scientific, regulatory, social and political evolution of fisheries management in the Northwest Atlantic, culminating in a distrustful and adversarial climate, a convergence of diverse policy needs, and the emergence of a multi-stakeholder cooperative research program--the Northeast Consortium. The institutional structure and activities of the Northeast Consortium are presented and we conclude with a discussion of the role of cooperative research in building mutual understanding and respect, trust and scientific legitimacy.