Like Robert Rauschenberg, Peter Max is one of many famous artists who has offered his talents free of charge for environmental causes. He identifies as an environmentalist, frequently creating work in which he explores space, time, and history. Here, he uses his signature psychedelic style to celebrate an idealized environmental future. This poster was commissioned by the United Nations as the official artwork for Earth Day in 1992. It was also used as part of a larger composition for a series of U.S. postage stamps made for that year’s Earth Summit. Held in Rio de Janeiro, the United Nations Conference on Environment and Development—commonly referred to as the Earth Summit—was a global forum that brought together scientists, politicians, and other invested parties to discuss the interconnected and systemic issues related to biodiversity, the global water supply, air pollution, and climate change.