Why men’s and women’s roles changed so fast

Traditional relationship roles did not disappear because one generation suddenly discovered that every earlier generation had been foolish. The environment changed.

Over roughly two centuries, industrialization, machinery, education, contraception, declining fertility, modern medicine, household technology, market services, and government institutions altered the practical requirements of family life. When the work changed, relationships changed with it.

Work left the household

The first great change was industrialization. For centuries, home and work frequently overlapped. A farm was both residence and business. A craftsman’s house could contain his workshop. A merchant’s family might participate in the enterprise. Industrialization increasingly separated the two. Production moved into factories, offices, mines, railways, shops, and specialized firms.

Claudia Goldin’s influential research describes women’s labour participation as following a U-shaped pattern during development. At first, measured participation declined as production moved out of family farms and businesses. Later, it increased as economies created educated, white-collar, and service-sector employment more compatible with women’s entry into market work.

That shift fundamentally changed marriage. Instead of organizing labour primarily within a household enterprise, couples increasingly had to decide how many adults would participate in an external labour market.

Machines reduced the value of strength

Traditional economies used muscle. Modern economies use machines.

Tractors replaced large amounts of human and animal labour. Engines moved freight. Power tools transformed construction. Factories mechanized production. Forklifts moved heavy loads. Computers transformed administration and information work.

This reduced one of men’s most important historical economic advantages: greater average physical strength. A male and female accountant can perform essentially identical work. The same is true of enormous portions of law, administration, finance, medicine, programming, design, sales, and education. The modern economy therefore opened vastly more occupations in which sex differences in physical capacity matter little.

Fertility fell

Traditional families also contained more children. In pre-modern societies, five or six births per woman were common. High child mortality meant many families experienced repeated births simply to produce a smaller number of surviving children.

Modern fertility fell dramatically. Fewer pregnancies mean fewer years spent pregnant. Fewer infants mean fewer years of intensive infant care. Smaller families reduce the amount of domestic work required across adulthood. This alone changes the economics of specialization. A woman raising six children over twenty years faces a very different allocation problem from a woman raising one or two children.

Contraception changed planning

Reliable contraception changed more than family size. It changed timing. Women could increasingly decide whether pregnancy happened before, during, or after education and career development. Goldin and Lawrence Katz found that expanded access to the birth-control pill among young unmarried women was associated with delayed marriage and increased investment in long professional education.

That matters for relationships because a woman entering marriage at 28 with a degree, career, income, and professional identity enters a different bargaining and household environment from a woman marrying at 19 before establishing independent earning power. The modern partnership model partly grows from that changed life course.

Education expanded

Women’s education changed rapidly during the twentieth century. By 1960, women were still a minority of American undergraduates. Later, they became the majority. The gender gap in college completion not only closed but reversed.

Education increases the potential return from market work. It therefore increases the opportunity cost of leaving employment entirely. If one spouse can earn little outside the household, specialization at home may be economically attractive. If both spouses have valuable professional skills, removing either one from the labour market becomes more expensive. Dual-income households become more logical.

Women’s careers became continuous

Earlier generations of women frequently expected employment to be temporary: work before marriage, then perhaps work again after children were older. Modern women increasingly expect sustained careers. Goldin describes a “quiet revolution” beginning with cohorts born in the 1940s in which women’s expectations, education, professional investment, workplace attachment, and role in household decision-making changed substantially.

The change was not simply that women worked. Women had always worked. The change was that employment increasingly became a continuous career and an important part of adult identity. Marriage had to adapt.

Household production changed

Technology also transformed the home: running water, electricity, washing machines, refrigerators, vacuum cleaners, modern stoves, supermarkets, prepared foods, automobiles, and disposable products. Some tasks became dramatically easier. Others disappeared or moved into markets.

Interestingly, appliances did not simply erase housework. Valerie Ramey’s reconstruction of U.S. time use found that prime-age women’s home-production time fell only about six hours per week between 1900 and 1965, then another twelve hours between 1965 and 2005. Men’s home-production time rose by about thirteen hours over the century.

Technology often raised standards as well as productivity. People washed clothes more often. Homes became cleaner. Children received more intensive care. Shopping and household management changed. Still, the division of domestic labour became considerably less one-sided.

Markets and governments absorbed family functions

Families also outsourced work. Schools educate children. Daycares supervise them. Restaurants cook. Stores produce clothing. Hospitals provide healthcare. Insurance pools risk. Pensions fund retirement. Nursing homes provide eldercare. Government programs provide income support.

Households remain important. But they no longer need to provide every service internally. That weakens the economic pressure toward a permanently specialized husband-and-wife team.

From assigned roles to negotiated roles

Put these changes together. Physical strength matters less. Women have fewer children. Pregnancy can be timed. Education raises women’s earning power. Careers are longer. Household work is partly mechanized and partly outsourced. Governments and markets provide services families once had to produce themselves.

The result is predictable. Roles become negotiable. Instead of entering marriage with a largely predefined package of responsibilities, couples can ask: Who earns more? Who enjoys which work? Whose career is more flexible? Who stays home after a birth? Can we afford daycare? Should both work? Should one work part-time?

Traditional roles were not merely argued out of existence. The environment that made them unusually efficient changed. That does not tell us whether every traditional practice should disappear. It tells us why modern couples have choices earlier families often did not. The next question is what they should do with that freedom.

Research & references

• Claudia Goldin, “The U-Shaped Female Labor Force Function in Economic Development and Economic History.”
• Claudia Goldin, “The Quiet Revolution That Transformed Women’s Employment, Education, and Family.”
• Claudia Goldin and Lawrence Katz, “The Power of the Pill.”
• Goldin, Katz, and Kuziemko, “The Homecoming of American College Women.”
• Valerie Ramey, “Time Spent in Home Production in the Twentieth-Century United States.”
• Our World in Data, historical fertility and child-mortality datasets.