The UN General Assembly, a body including representatives of all UN member governments, serves as the primary forum for defining a better world order through peaceful change. It has endorsed programs of peaceful change at all levels of ambition at different times and on different issues. Much of its activity has focused on the minimalist goal of averting or ending particular wars. On other issues, most notably decolonization, national economic development, and adding environmental concerns to the intergovernmental agenda, it has contributed to incremental change in the states system. Yet the limits on what governments would endorse became clear on issues such as human rights where changes would affect domestic political orders. The end of the Cold War and related domestic-level political changes provided the context for higher ambition, which peaked in 2005 when the General Assembly endorsed the Sustainable Development Goals (SDGs). The SDGs offered a vision of deep peace in which universal respect for human rights, human development, and human security prevail within ecologically sustainable societies. Yet the subsequent spread of authoritarian rule within states and increased geopolitical tensions between major states have reinforced governments’ traditional approaches to states system, reducing the ambition of programs for peaceful change.