With the rapid pace of globalization, psychologists internationally are experiencing complex ethical challenges. This paper explores the history and evolution of ethics and multiculturalism and their effect on the development of supervision practices for psychologists in the United States and Canada. Themes include the importance of harmonizing existing ethical rules or standards with professional ideals when responding to cultural diversity; (a) integrating different social contexts and worldviews of client, supervisee/therapist, and supervisor, and (b) responding in a manner that reflects enlightened rather than unilateral globalization-all within the power differential implicit in supervision. Historical and cultural context; (a) international perspectives, ethical guidelines, and codes, (b) evolving supervision guidelines, and (c) developments toward positive solutions are oudined. Recommendations for the future are formulated regarding graduate student/supervisee training, supervisor training, continuing education, and the development of ethical guidelines for supervision.Since the mid 20th century, the pace of globalization has in creased exponentially. Advances in technology, ease of travel, and political events have resulted in increased international communi cation and collaboration as well as large-scale migrations of per sons to various parts of the world (Sinclair, 2012a). As a result, psychologists face new realities and "live in a world where tradi-