Founded in May 1977, Sigma Kappa became the first sorority at Dartmouth College. In April 1981 Sigma Kappa moved into 10 West Wheelock, formerly inhabited by Phi Gamma Delta Fraternity. Sigma Kappa went local in the fall of 1988, becoming Sigma Delta. Sisters and alumni felt there were irreconcilable differences between the Dartmouth chapter and Sigma Kappa National, specifically religion in rituals and an emphasis on men in National songs and overall attitudes. The classes of 1989, 1990, and 1991 created a new philosophy based on strength, friendship, and acceptance of difference. Since then, Sigma Delta has continued to strive to offer a welcoming environment to all. There are currently over one hundred active members.