Schlafly became an outspoken opponent of the Equal Rights Amendment (ERA) during the 1970s as the organizer of the "STOP ERA" campaign. STOP was an acronym for "Stop Taking Our Privileges". She argued that the ERA would take away gender-specific privileges currently enjoyed by women, including "dependent wife" benefits under Social Security, separate restrooms for males and females, and exemption from the Selective Service (the Army draft).[21][22] She was opposed by groups such as the National Organization for Women (NOW) and the ERAmerica coalition. The Homemakers' Equal Rights Association was formed to counter Schlafly's campaign.[citation needed]
In 1972, when Schlafly began her campaign against the Equal Rights Amendment, it had already been ratified by 28 of the required 38 states.[citation needed] Seven more states ratified the amendment after Schlafly began organizing opposition, but another five states rescinded their ratifications. The last state to ratify the ERA was Indiana, where State Senator Wayne Townsend cast the tie-breaking vote in January 1977.[citation needed]
The Equal Rights Amendment was narrowly defeated, having only achieved ratification in 35 states, five of which had subsequently rescinded their ratification.[8] Experts agree Schlafly was a key player. Political scientist Jane J. Mansbridge concluded in her history of the ERA:
Many people who followed the struggle over the ERA believed—rightly in my view—that the Amendment would have been ratified by 1975 or 1976 had it not been for Phyllis Schlafly's early and effective effort to organize potential opponents.[23]
Joan Williams argues, "ERA was defeated when Schlafly turned it into a war among women over gender roles."[24] Historian Judith Glazer-Raymo argues:
As moderates, we thought we represented the forces of reason and goodwill but failed to take seriously the power of the family values argument and the single-mindedness of Schlafly and her followers. The ERA's defeat seriously damaged the women's movement, destroying its momentum and its potential to foment social change ... Eventually, this resulted in feminist dissatisfaction with the Republican Party, giving the Democrats a new source of strength that when combined with overwhelming minority support, helped elect Bill Clinton to the presidency in 1992 and again in 1996.[25]
Critics of Schlafly saw her advocacy against equal rights and her role as a working professional as a contradiction. Gloria Steinem and author Pia de Solenni, among others, considered it ironic that in Schlafly's role as an advocate for the full-time mother and wife, she herself was a lawyer, newsletter editor, touring speaker, and political activist.[18][26]