Former relief-worker, investment banker, and social entrepreneur, Mark Nelson founded and co-directs Stanford Peace Innovation Lab, where he researches mass collaboration and mass interpersonal persuasion. Mark focuses on designing, catalyzing, incentivizing, and generating resources to scale up collective positive human behavior change. He has described a functional, quantitative definition of peace, in terms of technology-mediated engagement episode quantity and quality across social difference lines; he has identified innovative, automated ways to measure peace, both at the neighborhood and global level; and he has developed a formal structural description for Peace Data. He leads the Global OPEN Social Sensor Array project, and designs technology interventions to measurably increase positive, mutually beneficial engagement across conflict boundaries. Mark’s mission is to create an entire new, profitable industry, where positive peace is delivered as a service. Other projects include EPIC Global Challenge and Peace Markets. Mark is also a researcher and practitioner at Stanford Persuasive Technology Lab, and a member of Stanford’s Kozmetsky Global Collaboratory.