Kathryn Casteel and Kara Chin write for FiveThirtyEight: “In 1970, women made up only 38 percent of the paid labor force, and that share was even smaller in many of the best-paid industries. As a result, the Women’s Strike for Equality focused in part on women who typically participated in unpaid labor at home.
“’I remember a saying from that time was, ‘Don’t iron while the strike is hot,’ said Terry O’Neill, the current president of the National Organization for Women. ‘Part of the reason for the wage gap was the formal exclusion of women from certain job categories.’”