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How did legal protections for women workers change from restrictions to equal-opportunity rules?

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The Code of Hammurabi diorite stela, with carved figures at the top showing Hammurabi seated with cuneiform inscriptions below. — Labour law Diorite stela inscribed with the Code of Hammurabi, 18th century bce.

The evolution of labour law regarding women shifted from protective, restrictive legislation to frameworks centered on equal opportunity.

Early Protective Legislation

During the Industrial Revolution, labour laws were enacted to protect women and minors from poor working conditions, such as excessive hours and night work. Early 20th-century Progressivism furthered this by establishing minimum wage laws exclusively for women and minors, viewing them as particularly vulnerable groups. However, these protections often became discriminatory; by limiting hours or the types of work women could perform, these laws frequently made women less employable than men.123

The Shift to Equal Opportunity

By the mid-20th century, as women’s employment roles became more varied, the focus of labour law transformed. Legislation began to prioritize equal rights over restrictive protections:1

Equal Pay Act of 1963: Mandated equal pay for equal work, challenging the historical bias that women’s income was secondary.3
Civil Rights Act: Title VII prohibited employment discrimination based on sex and established the Equal Employment Opportunity Commission.4
Modern Accommodations: Legal emphasis shifted toward maternity protection and facilities that support family responsibilities, with some accommodations, such as paternity leave, increasingly extended to all employees.1