The Dialogue Circle Method (previously known as “Diversity Circles” ) was developed during the spring of 1991 by Angelo John Lewis with the support of a twelve-person planning committee at Princeton University. The method has since been used at a range of institutions that include AT&T, the American Association of University Women, Creighton University, Hoechst Celanese, The Rockefeller Foundation, and Princeton University as part of both ongoing organizational development initiatives and team-building activities.