This is the authoritative guide for current and future psychologists around the world who are or want to be engaged in international efforts and opportunities and meet pressing global needs. Psychologists are increasingly applying their knowledge, skills, and values to big picture issues such as sustainability, human rights, conflict resolution, global education, and religious and cultural understanding. However, education, training, and professional development often overlook "thinking and acting globally" as a vital component of the professional identities of psychologists. With decades of international experience as scholars, educators, practitioners, policymakers, and consultants, contributors to this book describe exemplary programs, relevant trends, and dynamic possibilities for global engagement. They focus specifically on nine areas of expertise through which psychologists can make a difference: advocacy, assessment, consultation, intervention, leadership, policy, research, service, and teaching. They also highlight opportunities for international and interdisciplinary collaboration while empowering indigenous voices and psychologies.