In this chapter, we are going to look at demographics—which is just a fancy word for the study of population. We will explore how and why the UK population has changed since 1900. We’ll look at four main "engines" of change: Births, Deaths, Aging, and Migration. This is a vital part of your Families and Households paper because the size and shape of the population directly affect how we live in families!

1. Birth Rates and Family Size

The Birth Rate is the number of live births per 1,000 of the population per year. Since 1900, there has been a long-term decline in the UK birth rate. While there were "baby booms" after World War I and World War II, the overall trend is downward.

Why are people having fewer children?

Changes in the position of women: This is perhaps the most important factor. In the 20th century, women gained more legal rights, better education, and career opportunities. Many women now choose to delay childbearing to establish a career, or they choose to have fewer children so they can continue working. This leads to a rise in "child-free" or "child-delayed" families.

Decline in the Infant Mortality Rate (IMR): The IMR is the number of babies who die before their first birthday.
\(IMR = \frac{\text{Deaths of infants under 1 year}}{\text{Total live births}} \times 1,000\)
In 1900, the IMR was high, so parents had many children to "replace" those who might die. Today, because of better healthcare and nutrition, almost all babies survive, so parents feel they don't need to have as many.

Children as an "Economic Liability": In the past, children were "economic assets" because they could work and bring in money. Today, laws protect children from work, and they stay in education much longer. Children now cost parents a lot of money until they are adults!

Child-centredness: Society now focuses more on the quality of childhood rather than the quantity of children. Parents prefer to have one or two children and give them the best "start in life" (lavish toys, holidays, and education) rather than having five or six children they can't afford to spoil.

Key Takeaway:

Smaller family sizes mean that women are more likely to be in paid work, creating the dual-earner professional family that is common today.

2. Death Rates and Life Expectancy

The Death Rate is the number of deaths per 1,000 of the population per year. In 1900, the death rate was about 19; today it has nearly halved. Life Expectancy (how long the average person is expected to live) has also risen significantly.

Why are we living longer?

Improved Nutrition: Better diets mean people are more resistant to infection. This was a major factor in the early 20th century, even before modern medicine became advanced.

Medical Improvements: The creation of the NHS in 1948, the development of antibiotics, immunisations, and improved maternity care have all helped people live longer and reduced deaths from infectious diseases like pneumonia or TB.

Public Health Measures: Government action has improved the quality of our environment. Examples include cleaner drinking water, better sewage disposal, and the "Clean Air Acts" which reduced smog in cities.

Social Changes: The decline of dangerous manual labor (like coal mining) and a reduction in smoking have also helped increase life expectancy.

Quick Review:

We are moving from a society where people died young from "infectious diseases" to one where people live long lives and eventually die from "diseases of affluence" (like heart disease or cancers associated with old age).

3. An Ageing Population

Because birth rates are falling (fewer babies) and life expectancy is rising (older people living longer), the UK has an Ageing Population. This means the average age of the population is getting higher.

The Impact of an Ageing Population:

Public Services: Older people consume more health and social care services. This puts pressure on the NHS and government budgets.

One-Person Households: There is a rise in elderly people living alone (mostly widows, as women tend to live longer than men). This is known as "living alone" in old age.

The Dependency Ratio: This is the relationship between the "productive" part of the population (those working) and the "dependent" part (those not working, like retirees and children).
\(Dependency \ Ratio = \frac{\text{Number of Dependents}}{\text{Number of Working Age Population}}\)
As the population ages, the "working" group has to support a much larger "dependent" group through their taxes.

Changes to the Family: We now see more "beanpole families" (families that are tall and thin—lots of generations like great-grandparents, but few aunts, uncles, or cousins). Many middle-aged people find themselves in the sandwich generation, caring for their own children and their elderly parents at the same time.

Memory Aid:

Think of the population as a pyramid. In 1900, it had a wide base (lots of babies) and a tiny top (few old people). Today, it looks more like a block or a cylinder—the base is narrow and the top is heavy!

4. Migration and Globalisation

Migration refers to the movement of people from one place to another.
Immigration = Moving INTO a country.
Emigration = Moving OUT of a country.
Net Migration is the difference between the two numbers.

Trends in Migration:

Until the mid-20th century, the UK usually had more people leaving than arriving. However, since the 1950s, this has changed.
Example: After World War II, the UK invited people from Caribbean and Asian countries (the "Windrush generation") to help rebuild the economy. More recently, migration from the European Union increased before the UK left the EU.

The Impact of Globalisation:

Globalisation is the idea that the world is becoming more interconnected. This affects demographics in several ways:

More Diversity: Migration has led to more multi-cultural family structures and more hybrid identities (where people feel they belong to more than one culture).

Different Birth Rates: Immigrant populations often have slightly higher birth rates than the UK-born population, which has helped keep the UK population from shrinking.

Blurred Boundaries: Globalisation means people move back and forth more easily for work or study. We no longer just "move once"; many people are transnational, meaning they have homes or family ties in multiple countries.

Common Mistake to Avoid:

Don't assume migration is only about people "coming here to stay." Globalisation means migration is now more circular—people might come to the UK for a few years to work and then move somewhere else or return home.

Summary: Putting it All Together

When you are writing about demographics in your exam, remember these links to the family:

1. Fewer births = Smaller families and more women in careers.
2. Longer life = More grandparents involved in childcare.
3. Ageing population = More pressure on the "sandwich generation" to provide care.
4. Migration = Increased family diversity and multi-cultural households.

Cross-reference: For more on how these trends affect specific family types, see the chapter on "Marriage, cohabitation, divorce and family diversity".