On Earth Day weekend , Earth Optimism summits and related events around the world celebrated conservation success stories. In Washington, DC, over presentations featured progress in protecting species and spaces, reducing pollution, restoring habitats, harvesting wisely, and tackling climate change (EarthOptimism, ). Participants included not only conservation scientists, but also policy makers, students, artists, engineers, inventors, and representatives of business, media and philanthropy. The successes described during the summits represented a