Master communicator Marge Anderson works at the Wisconsin-based nonprofit Slipstream, Inc., where she shapes education to drive behavior change around energy. She chaired the US Green Building Council in 2015, and was in Paris for the climate talks. She says that her working-class upbringing did not suggest a path to sustainability but it has informed her leadership in the field. She is an optimist (and cites British environmental leader Tony Juniper on this: “it’s too late for pessimism”), but she feels great urgency and is startlingly succinct: “On climate, we’ve got nine and a half years left. On equity, we’re 400 years too late.”