Social Change and Family Structures

Why Has Family Structure Changed?

Since the mid-twentieth century, the range of family diversity in the UK has grown significantly. The nuclear family — two parents and their dependent children — remains the most common form according to ONS data, but the proportion of lone parent families, cohabiting couples and reconstituted families has grown substantially. Sociologists identify several interconnected drivers of this change. Understanding them as a set of causes, rather than listing them in isolation, is the key to top-band answers on this topic.

Drivers of Change in Family Structure

The specification identifies five key drivers of change in family forms. Each has reshaped both the structure of households and the norms attached to family life:

Secularisation refers to the long-term decline in the social influence of religion. The Church of England and the Roman Catholic Church traditionally taught that marriage was a lifelong sacrament and that divorce, cohabitation and same-sex partnerships were morally wrong. As church attendance fell across the twentieth century, religious authority over personal and family decisions weakened. Cohabitation, previously stigmatised, became socially mainstream. Divorce became more acceptable. By the early twenty-first century, same-sex partnerships were legally recognised through the Civil Partnership Act 2004 and the Marriage (Same Sex Couples) Act 2013 — changes that would have been unthinkable in a highly religious society.

Feminist movements of the 1960s and 1970s challenged the expectation that women should primarily be wives and mothers. Legal changes followed: the Equal Pay Act 1970 and Sex Discrimination Act 1975 expanded women’s access to paid employment and economic independence. As women gained greater financial autonomy, they became less dependent on marriage for economic security. This contributed to a rise in both cohabitation (as women delayed or avoided marriage) and divorce (as women were able to leave unsatisfactory marriages). The growth of lone parent families — the large majority headed by women — is partly explained by women’s greater capacity to live independently. Ann Oakley and feminist sociologists argued that these changes represented progress away from the patriarchal conventional family.

Economic factors shape family formation in significant ways. The growth of dual career families — where both partners are in paid employment — reflects both feminist gains in the labour market and economic necessity (rising housing costs in many parts of the UK have made a single income insufficient). Conversely, economic inequality and poverty reduce the options available to families. Young adults who cannot afford independent housing may delay family formation, contributing to later ages of first marriage and first parenthood. High housing costs have also driven the growth of “boomerang children” — adult children who return to the parental home after university or following relationship breakdown.

Technological change has reshaped family formation in two main ways. First, the widespread availability of reliable contraception since the 1960s separated sex from reproduction, making cohabitation and non-marital relationships less likely to result in unplanned pregnancies. This contributed directly to the normalisation of cohabitation and to declining birth rates and smaller family sizes. Second, digital communication technologies have transformed how extended family networks stay in touch across long distances, keeping emotional ties alive in families that live far apart.

Post-war immigration, particularly from South Asia, the Caribbean and more recently Eastern Europe, has diversified family forms in the UK. South Asian communities often maintain stronger extended kinship networks and a greater emphasis on arranged marriages than the White British average. African-Caribbean communities have higher rates of lone parent households. These differences should be understood sociologically — they reflect distinct cultural traditions, historical experiences and economic conditions, not family dysfunction. Migration itself can also disrupt family forms, creating transnational families in which members live across different countries.

The Rapoports: Five Types of Family Diversity

Rhona and Robert Rapoport argued that British society is characterised by diversity rather than a single dominant family form. Rather than simply counting different household structures, they identified five distinct dimensions of family diversity in their 1982 analysis — showing that diversity runs far deeper than structure alone:

Organisational diversity: differences in the way families divide paid and unpaid work. For example, dual career families versus families with a traditional breadwinner-homemaker split.
Cultural diversity: differences related to ethnicity and religion. South Asian families in the UK may maintain stronger extended kinship networks; Muslim, Hindu or Jewish families may organise marriage and gender roles differently.
Social class diversity: working-class and middle-class families differ in income, housing, parenting styles and the opportunities available to children.
Life cycle diversity: family structure changes across an individual’s life — a young childless couple, a family with young children, a beanpole family with elderly grandparents and a lone individual are all at different life cycle stages.
Cohort diversity: people born in different generations have experienced different historical conditions. Attitudes to divorce, cohabitation and same-sex partnerships differ markedly between older and younger cohorts.

Key Fact

The Rapoports (1982) identified five types of family diversity in Britain: organisational, cultural, social class, life cycle and cohort. These show that family diversity is not simply about different household structures — it runs through differences in work patterns, ethnicity, social class, life stage and generational experience.

Trends in Family Change: Divorce, Cohabitation and Singlehood

Several statistical trends illustrate how family structures have changed in Britain since the 1970s. Divorce rates rose dramatically after the Divorce Reform Act 1969, peaking in the 1990s before declining somewhat (partly because fewer people are marrying in the first place). Cohabitation has grown from a small minority of couples in the 1970s to a common arrangement today. The age of first marriage has risen steadily: in 1970 the average age of first marriage was in the mid-twenties; by the 2020s it had risen to the early thirties. Singlehood — living alone, either by choice or circumstance — has also increased, driven by both higher divorce rates and a trend towards later partnership formation. Serial monogamy — a succession of committed relationships — has become more common as remarriage rates remain significant.