Understanding demography and population change

Demography is the sociological study of population trends and changes. It examines how societies evolve over time through various influences.

Key factors in demographic change

Population changes result from a combination of elements that affect the size and composition of a society.

These factors include:

• Fertility rate - The average number of children born to women of childbearing age, which influences how quickly a population grows.
• Mortality rate - The number of deaths per 1,000 people in a population each year, which can reduce population size.
• Net migration - The difference between immigration (people entering the country) and emigration (people leaving the country), which can either increase or decrease the overall population.

Trends in UK birth rates

The birth rate is a key measure in demography, showing the number of live births per 1,000 people in the population each year. In the UK, this rate has shown significant changes over time.

Long-term decline in birth rates

Over the past century, the UK birth rate has fallen dramatically. For example, it decreased from 28 live births per 1,000 people in 1900 to around 13 per 1,000 in 2007. This trend reflects broader social shifts.

Total fertility rate as a measure

The total fertility rate (TFR) calculates the average number of children a woman is expected to have during her lifetime. This rate has also declined, dropping from 3.5 children per woman in 1900 to 1.94 in 2012.

Reasons for the decline in birth rates

Several social, economic, and cultural factors have contributed to the steep drop in UK birth rates during the 20th century.

Changes in women's roles and opportunities

As women gained access to higher education and better career prospects, their priorities shifted away from large families. Sociologist Wilkinson highlights how, in the 1980s and 1990s, children became less central to women's lives. This is supported by Sharpe's research, which compared attitudes of girls in the 1970s (who prioritised marriage and family) with those in the 1990s (who focused more on careers).

Women began marrying later and delaying childbirth, often into their 30s or 40s. For instance, fertility rates have risen most sharply for women aged 35–39 and over 40. In 2015, the fertility rate for women aged 40 and over exceeded that for those under 20 for the first time since 1947.

Advances in contraception and family planning

The introduction of the contraceptive pill in 1961, made widely available through the National Health Service (NHS), gave women greater control over their fertility. This allowed couples to decide if and when to have children, reducing unplanned births and overall family sizes.

Economic and living standard improvements

Better nutrition, hygiene, housing, and public health reduced infant mortality, meaning families no longer needed many children to ensure some survived to adulthood. Economic progress, including job opportunities and the welfare state (such as old-age pensions), meant children were no longer essential as economic support for parents in later life.

Rising living standards also made raising children more expensive, prompting couples to limit family size. High housing costs, including rents and ownership, often lead couples to delay or reduce the number of children they have.

Cultural and social shifts

Secularisation, the decline in religious beliefs and practices, has relaxed attitudes towards contraception and abortion, making family planning more acceptable.

Sociologists Beck and Beck-Gernsheim argue that increasing individualism means people are less bound by traditional expectations. Instead, they may choose to invest in personal lifestyles, such as travel or housing, rather than having children.

Fluctuations in birth rates and the role of immigration

While the overall trend in UK birth rates has been downward, there have been notable ups and downs.

Historical baby booms

The UK experienced baby booms after the First and Second World Wars, as well as in the late 1980s to early 1990s. These periods saw temporary increases in births due to post-war optimism, economic recovery, or social changes.

Recent increases and immigration's impact

Since 2001, the birth rate has risen steadily, with the 2010 birth rate being the highest for 37 years. Much of this increase stems from immigration, particularly from Eastern Europe and Africa. In 2008, babies born to mothers from overseas made up 24% of all UK births, up from 14% in 1998.