Peter H. Gleick (born January 1, 1956) is an American scientist and water policy expert renowned for his work on environmental issues, particularly water resources, climate change, and their intersections with human health and development. He co-founded the Pacific Institute in Oakland, California, in 1987, a non-profit organization focused on sustainable water management, and served as its president until becoming president emeritus. Gleick's contributions earned him a MacArthur Fellowship in 2003 for his innovative approaches to water policy and resource conflicts. He is also an elected member of the U.S. National Academy of Sciences and the International Water Academy in Oslo, Norway. Gleick has authored several influential books, such as 'The Three Ages of Water' (2023), and has been featured in media outlets like Wired Magazine as a key voice on environmental policy. Throughout his career, he has addressed global challenges like water scarcity, climate impacts on freshwater systems, and equitable resource distribution, consulting for international organizations and appearing in environmental documentaries. However, Gleick's career has been marked by controversy in 2012 when he admitted to obtaining internal documents from the Heartland Institute, a climate change skeptic organization, through deceptive means by impersonating a board member. This incident, which involved leaking the documents to expose funding sources for climate denial efforts, led to significant backlash, including his temporary resignation from the National Academy of Sciences ethics committee and widespread debate over the ethics of such activism in scientific circles. Gleick continues to advocate for evidence-based environmental policies, publishing extensively on topics like the human right to water and geopolitical tensions arising from resource shortages, positioning him as a pivotal figure in networks addressing global sustainability and influence in environmental discourse.