New in paperback. Hardcover was published in 2021. The Third UN is the ecology of supportive non-state actors - intellectuals, scholars, consultants, think tanks, NGOs, the for-profit private sector, and the media - that interacts with the intergovernmental machinery of the First UN (member states) and the Second UN (staff members of international secretariats) to formulate and refine ideas and decision-making at key junctures in policy processes.