Studying abroad has become a key educational means for preparing graduates with the intercultural competencies needed to succeed in our global economy. The federal government, business community, and higher education sector are united in their belief that study abroad is critical to such success. This monograph seeks to address two fundamental questions: Who studies abroad (or who does not) and why? What are the outcomes of study abroad? Increasing and broadening study abroad participation have proven particularly challenging, and the authors look to the research for how it might be improved. Although research suggests positive outcomes of study abroad, existing studies leave educators with some challenging questions. Based on their review, the authors pose recommendations for ways in which study abroad in the twenty-first century can renew its purposes and fulfill its promise.