Combine the nimbleness of entrepreneurship with the solutions-driven framework of social ventures, and the result is the disruptive, effective and challenging career of the social entrepreneur. CIW sits down with four Bluhm/Helfand Social Innovation Fellows, all under the age of 35, who daily work to solve seemingly impossible global problems. What to expect: BlocPower’s Donnel Baird on lighting our nonprofits; EarthEnable’s Gayatri Datar on improving health through better flooring; Democracy Works’ Seth Flaxman on making voting better; Disease Diagnostic Group’s John R. Lewandowski on how to diagnose malaria in one second