“[T]here´s a five-letter word I’d like to repeat and repeat and repeat: Trust.”Thus spoke Elinor Ostrom in her 2009 Stockholm lecture, when at age 77 she became the first woman to receive the Nobel Prize in Economics. A professor of political science at Indiana University-Bloomington until her death in 2012, she’d spent a lifetime traveling the world and observing everyday citizens cooperating against all odds...