Since its establishment in 1945, the United Nations has been in a constant state of transition as various international stakeholders seek ways to improve the efficiency and effectiveness of the U.N. system. This book examines the process by which Congress provides the funding for U.S. assessed contributions to the regular budgets of the United Nations, its agencies and U.N. peacekeeping operation accounts, as well as for U.S. voluntary contributions to U.N. system programs and funds. It also explores United Nations Human Rights Council and reform issues for Congress.