Book excerpt: The Ethics of Group Psychotherapy provides group psychotherapists with the ethical and legal foundation needed to engage in effective decision-making in their everyday group practices. This text provides readers with a framework for understanding ethical dilemmas through a review of major models of ethical thinking, including principlism, feminism and the ethics of care, and virtue ethics. The authors use this foundation to explore those problems emerging most routinely in group practice, among which are safeguarding members’ personal information, protecting members’ autonomy, and helping members to process differences—particularly those related to privilege and oppression—in a way that furthers interpersonal relations and social justice. Throughout the text, practical tools such as using assessments to aid in member selection and tracking progress and outcome through measurement-based care are offered that bolster the group psychotherapist’s effectiveness in ethical decision-making. Featuring questions for discussion and items to assess the reader’s master of the material, this text will be a valuable tool in classroom and small-group learning.