In the 1980s and 1990s, climate change was a threat, not a reality. Back then, climate leaders hoped to slow or stop warming before our civilization would see material weather-related effects or reach levels of warming that would risk irreversible changes. Those leaders—people like George Woodwell, who created the institution that brought me into this work—achieved admirable results, building the infrastructure, frameworks, and culture that came to define the climate action community.