[Excerpt] Union-management cooperation is not a passing fad. It is not a new, or even a recent, development on the American labor relations scene. Nonetheless, interest in this subject has been growing. It is the purpose of this article, first, to clarify the meaning of union-management cooperation, indicating what it is and what it is not; second, to describe its history in the United States, going back to World War I; third, to explain the forces, both past and present, that have led to the development of union-management cooperation; fourth, to describe the various mechanisms employed to achieve this cooperation, including the levels of involvement and their scope; fifth, to set forth the necessary and sufficient conditions for successful union-management cooperation: and, finally, to discuss its future.