Bye-Bye Marriage, Hello Cohabitation

Marriage rates, especially among young adults, have declined substantially over the past seventy-five years. Credit- Shutterstock via IPS

by Joseph Chamie (portland, usa)

PORTLAND, USA, May 14 (IPS) - Until the middle of the 20th century, marriage between men and women was the societal norm among countries, and the cohabitation of couples was uncommon and stigmatized. In the subsequent decades, however, that situation changed significantly worldwide.

Marriage rates, especially among young adults, have declined substantially over the past seventy-five years. Additionally, women and men who decide to marry are doing so at older ages and having fewer children than in the recent past.

The median ages at first marriage for men and women have been steadily increasing in countries worldwide. The increasing marriage ages are partly due to increased education, employment, and career decisions; the evolving role and improving status of women; lifestyle preferences; and changing societal norms concerning personal relationships between men and women.

Besides marriage at older ages, couples are choosing to have fewer children than they had a half century ago. For example, the world’s average number of births per woman has declined from 5.3 births in 1963 to 2.3 births in 2023. Also, in over half of all countries, representing over two-thirds of the world's population, fertility rates are below the replacement fertility of 2.1 births per woman.

At the same time that marriage rates have been declining and women are having fewer births, cohabitation, or people living together without being married, has become increasingly acceptable and common in many countries worldwide.

In the United States, for example, the proportions of young adults and older adults living with a partner increased significantly over the past half century. Whereas in 1970 the proportion cohabitating was a fraction of one percent, by 2018 the percentage had increased to nearly 10% among those aged 18 to 24 years and to nearly 15% among those aged 25 to 34 years and those aged 65 years and older.

In 1970, cohabitation preceded about 11% of the marriages in the United States. That percentage increased significantly over the subsequent decades, and currently approximately 75% of marriages are preceded by cohabitation. Also, the large majority of Americans, close to 70%, say cohabitation is acceptable even if a couple doesn’t plan to get married.

With the increasing levels of cohabitation among young adults in the US, the proportion of births to unmarried mothers also increased. Whereas 5% of all births in the United States in 1960 were to unmarried women, the proportion increased to 33% by 2000 and reached approximately 40% by 2021.

Cohabitation is becoming more prevalent in most populations, particularly in Latin America and Western countries. In contrast, cohabitation is less common in some countries, especially in Asia and the Middle East, because of traditional roles and cultural norms. In those countries, such as Indonesia, Jordan, the Philippines, and Egypt, the large majority of adults in ages 18 to 49 years old are married.

However, even among some traditional countries, cohabitation has increased. For example, despite the religious laws in Iran, increasing numbers of young Iranian couples, especially those living in urban areas, are choosing cohabitation before marriage.

Non-marital cohabitation is also becoming increasingly common in China, gaining acceptance among young men and women living in urban areas. Similar to many Western countries, cohabitation in China among young adults has been increasing rapidly with older marriage ages, declining fertility levels, and increasing divorce rates.

Also, changes in Chinese laws may contribute to changes in public attitudes toward cohabitation. For example, whereas the Chinese Marriage Law of 1980 referred to “illegal cohabitation”, a 2001 amendment to the law changed the wording to “non-marital cohabitation”.

Similarly, in India, cohabitation is considered a taboo in traditional Indian society. However, over the recent past, cohabitation has become increasingly popular among young men and women in urban centers.

With more Indian women becoming educated, joining the labor force, and gaining financial independence, traditional attitudes toward marriage are shifting towards more acceptance of cohabitation. Again, live-in relationships are being used by many young couples in urban areas to test their compatibility and differences before making a commitment to marriage.

In contrast to many of the traditional countries in Asia and the Middle East, cohabitation across Latin America and the Caribbean has become increasingly prevalent since the 1970s. Also, adults aged 18 to 49 years have relatively low proportions married, often less than 30%.

Because of the comparatively high prevalence of cohabitation in many Latin American countries, the large majority of births in that region are out of wedlock. Between 2016 and 2020, approximately three-quarters of the children born in Latin America are estimated to have been born outside marriage. In countries such as Chile, Costa Rica, and Mexico, the percentages of births born out of wedlock in 2020 were no less than 70 percent.

Various factors are behind the increasing trend away from marriage and towards cohabitation. Among those factors are testing personal relationships, assessing compatibility, financial benefits, flexibility, widespread availability of modern contraceptives, disillusionment with the institution of marriage, and avoidance of legal and monetary obligations related to marriage, including the risks of divorce.

Cohabitation offers an opportunity for couples to get to know each other in a shared living environment. It permits couples to assess their compatibility and areas of discordance before deciding whether they wish to enter a marriage or remain cohabitating.

Cohabitation also typically avoids the legal process and formalities of marriage. It provides couples with the flexibility to move on with their lives if their personal relationship doesn’t work out. In addition, some men and women may not want to make a long-term commitment and take on the responsibilities and obligations that marriage typically entails.

While some cohabiting couples may choose to avoid making a long-term commitment, others may view cohabitation as providing a promising path to marriage. In many countries, including Brazil, France, Italy, the Netherlands, Switzerland, the United Kingdom, and the United States, the large majority of marriages are preceded by cohabitation.

Also, increasingly, in some countries, couples decide to wed after they've had children together. Having children for many couples often represents a serious commitment to one’s partner, and marriage provides those couples with a visible way to celebrate their commitment to each other and their family. There are also financial and legal benefits to getting married, including pensions and inheritance matters.

However, some concerns have been raised about the consequences of cohabitation on families. In general, cohabitation is less stable for families with children than marriage and contributes to the rise of single-parent households with fathers missing.

In a global study of over sixty countries, cohabitating couples with children were found to be more likely to break up than married couples. More specifically, in nearly all the countries examined, children born to cohabiting parents were significantly more likely to see their parents break up before age 12 compared to children whose parents were married at their birth.

In sum, over much of the past, marriage between men and women existed as the world’s societal norm, permitting men and women to live together, take part in sex, and have children. After the middle of the 20th century, that societal norm changed significantly, with marriage becoming increasingly replaced or preceded by the cohabitation of men and women and greater numbers of children born out of wedlock.

Joseph Chamie is a consulting demographer, a former director of the United Nations Population Division, and author of many publications on population issues, including his recent book, "Population Levels, Trends, and Differentials".

© Inter Press Service (2025) — All Rights Reserved.Original source: Inter Press Service