Like all markets, social-benefit markets provide a platform for buyers and sellers to exchange commodities, but they are distinguished by their unique goal of improving social and environmental conditions. For example, most people are familiar with carbon trading markets, which aim to reduce greenhouse gas emissions. Social-benefit markets are not only a promising strategy to combat pressing social and environmental problems; they are also contributing significantly to the world economy, with trading volumes estimated to reach $1 trillion by 2020. Still, the problems that these social-benefit markets address are large, complex and multifaceted; their development and sustenance therefore will require novel entrepreneurial approaches.