I’m convinced that our most pressing problems as a society will be solved by boundary crossers, because it takes multiple perspectives and approaches to understand complex issues. An announcement about David Yarnold’s appointment as Executive Director of the Environmental Defense Action Fund, speaks to this point. Yarnold, a Pulitzer Prize winning journalist turned environmental activist, was recently heralded by the president of Environmental Defense, as someone who "has shown great courage in completely crossing career fields — something few people have the guts to even try — and even fewer succeed at.”