The Public Relations Society of America adopted its first code of ethics in 1950, 2 years after PRSA was formed. During the next 50 years, the code was revised and updated several times to keep pace with industry practices and increased expectations for ethical performance. In 2000 a new code was adopted to heighten awareness of ethical issues and address concerns regarding code enforcement. In this article I trace the 50-year evolution of PRSA's codes of ethics and related code-enforcement activities.