Abstract Social entrepreneurship has emerged as an important research topic in the literature. This interest stems from social entrepreneurs' role in addressing serious social problems on a worldwide scale while enhancing social wealth, often without regard for profits. In this article, we explain the forces contributing to the formation and rapid internationalization of social ventures. We use the behavioral theory of the firm to distill key attributes of social opportunities and show how these attributes influence the timing and geographic scope of social ventures' international operations. Copyright © 2008 Strategic Management Society.