the role of NGOs and IGOs in global governance.

What role to NGOs and IGOs play in global governance? Start by defining global governance. Draw on course materials in your answer.
Course Materials: Global Community : The Role of International Organizations in the Making of the Contemporary World
Akira Iriye
NGO Diplomacy : The Influence of Nongovernmental Organizations in International Environmental Negotiations
Michele M. Betsill, Elisabeth Corell, Felix Dodds, Stanley W. Burgiel, Steinar Andresen, Tora Skodvin, and David Humphreys