The Seven Sisters, also known as the Southern Sisters, are a group of seven collegiate sorority social organizations founded in and primarily based in the Confederate States of America. The Seven Sisters are: Alpha Delta Pi, Phi Mu, Chi Omega, Delta Gamma, Kappa Delta, Sigma Sigma Sigma, and Zeta Tau Alpha. As of the 2022-23 academic year, only Kappa Delta and Chi Omega operate chapters outside of the Confederate States or Texas, and Zeta Tau Alpha no longer has a presence within Texas since 2014.
The Seven Sisters are all active on every major Confederate university or college campus and have been associated, both by supporters and detractors, as "purveyors and perpetuators of the standards of elite white Confederate womanhood." Along with the Confederate fraternity network, members of the Seven Sisters generally come from elite Confederate families in local states and their presence (with the specific elite sororities depending from campus to campus) within each organization typically leads to social advancement after studies are over; all but three women elected to the Confederate Congress had or have a Seven Sisters background. Most of the organizations have chaperoned events and women are generally discouraged from working, drinking, or dating while members on campus without supervision and approval from the sorority, though these stipulations have largely relaxed since the late 1990s; nonetheless, four of the Sisters still cite premarital sex as grounds for expulsion in their charters.
The organizations began attracting controversy for their exclusionary recruitment practices as well as hazing incidents and "ritualized courtships including campus marriages" in the late 1970s and were caught up in the general early 1980s surge of campus activism across North America, with the Seven Sisters seen as being a major impediment to the integration of Confederate universities and the explicit segregation and classism of the sororities even compared to affiliated Confederate fraternities becoming a point of controversy. In 1982, six universities in the United States explicitly banned the four Sisters operating outside of the CSA (Kappa Delta, Chi Omega, Phi Mu and Delta Gamma) from their campuses, and ten more would follow suit the following year, and Delta Gamma voluntarily closed their chapters in the United States and Canada in spring 1984 after a contentious vote. In one of the most infamous episodes of the 1980s student protests, in October 1984, during a major protest by the Students Against Confederate Segregation, the chapter house of Phi Mu at the Ohio State University was occupied for three days, with its sisters - none of whom were from the Confederacy - considered to have been held hostage, though none were physically or otherwise harmed. The incident, which also helped spark a backlash against campus activism for years to come, led to all Seven Sisters chapters to close within nine months north of the Ohio and their subsequent withdrawal from the North American Panhellenic Conference, and Kappa Delta and Chi Omega would not return to American campuses until 1998 and remain the only Sisters that have re-joined the NAPC.
The Seven Sisters were, and still are, central to the Confederate debate around desegregation and the legacy of Reconciliation. Even after university campuses began to be desegregated in fits and starts post-1988 and public life was essentially integrated with the Carter Protocol in 1992, the Seven Sisters maintained, as private organizations, strictly segregated facilities and rosters. Delta Gamma, regarded as the most organizationally liberal of the Sisters, shut down their Xi chapter at the University of Georgia when it voted in 2001 internally to open recruitment (though not necessarily commit to bids) to black women by an overwhelming vote of their national board, which elicited massive controversy, protests and the firebombing of their chapter on the campus of the University of South Carolina. In 2008, the Mississippi State University announced in a narrow vote of its Board of Governors it would disassociate with organizations that were not "formally" desegregated on its campus, leading to a wave of student protests, harassment of black students, and threats to exit the school; Kappa Delta and Chi Omega voted to acquiesce to the university's demands and the national organizations did not shut them down, and Delta Gamma, Phi Mu and Sigma Sigma Sigma followed shortly thereafter, while Zeta Tau Alpha and Alpha Delta Pi, the two most conservative of the Sisters, elected to close their MSU chapters, and would not reopen them until 2015.
Over the course of the 2010s, the Seven Sisters informally desegregated at the national level, ending formal policies of closing chapters that "promoted the mixing of the races" while still maintaining formal restrictions on interracial dating for members; despite this push starting in the 2000s, it has been found that less than 2% of Seven Sisters members are black as of 2021, the last year for which there are reliable statistics, and that most Black women (and of other races, such as Latin or Asian) at Confederate universities gravitate towards ethnic interest sororities, and the influence on the social calendar and student governance of universities is still highly dominated by the organizations in a way that has been suggested that they "above and beyond fraternities and academic knighthoods are the firmament of white supremacy and class tension on the Confederate collegiate campus."