The Intergovernmental Panel on Climate Change (IPCC) is the foundational United Nations body responsible for assessing the science related to climate change. Founded in 1988, the IPCC is now in its sixth assessment cycle, with a synthesis report from the three working groups that will roll out in 2021, and be finalized in the first half of 2022. The three working groups are: 1. The physical science basis, 2. Impacts, Adaptation, and Vulnerability, and 3. Mitigation of climate change. The IPCC authors and editors list (for section 1, 2, and 3) is extensive and highly international. The Chair’s vision paper for the sixth assessment is also available, and lays out both the report methodology and discusses the strategic positioning of this work and its timing.