Chapter 6: Dynamics of Population (Geography)

Demography studies the size, growth, distribution and composition of a population: age, gender, births, deaths and migration. A country needs this information to plan:

• Services: how many schools, teachers, hospitals, houses, and how much food and water will be needed, and where.
• The economy: how many young people will look for jobs, and what skills to train them in.
• For the elderly: pensions and healthcare for a growing number of older people.
• Policies for health, family welfare, women's education and migration.
• Resources and environment: how to share land, water and energy fairly.
• Elections and representation, which depend on population counts (the census).

It tells the government how many people there are, of what ages and where, so it can plan schools, hospitals, jobs, food, pensions and resources for present and future needs.

A fertility rate below the replacement level of 2.1 means fewer children are born than are needed to replace their parents. Over time:

• The workforce shrinks: fewer young people enter jobs, so farms, factories and offices may face labour shortages, and economic growth can slow down.
• The population ages: a larger share of elderly people, as in Japan, Italy and South Korea. China's over-65 share is expected to rise from 14% in 2023 to 26% in 2050.
• A heavier burden on workers: fewer working people must pay for the pensions and healthcare of more retired people.
• Less demand and innovation: fewer young consumers and fewer new ideas.
• The population may eventually shrink, as China's has since 2022.

Countries respond by encouraging families (with child care, paid leave and support), using technology and automation, raising the retirement age, or welcoming migrant workers.

Fewer young people enter the workforce, causing labour shortages and slower growth, while an ageing population raises pension and health costs carried by fewer workers (as in Japan and China).

Not always.

Possible benefits: a growing young population can give a large future workforce and many consumers, if they are healthy, educated and employed.

But a very high birth rate can cause problems:

• Pressure on resources: food, water, land, housing and energy.
• Strain on services: overcrowded schools and hospitals, and not enough teachers and doctors.
• Unemployment if jobs do not grow as fast as the population.
• Poverty and health: larger, poorer families may not afford good nutrition and education. Frequent pregnancies harm mothers' health.
• Environmental damage: deforestation, pollution and overcrowded cities.

The best situation is balanced growth, near the replacement level, with investment in health, education and jobs, so that people become an asset.

No: a high birth rate can provide a future workforce, but it also strains food, water, schools, hospitals and jobs, and can deepen poverty and environmental damage; balanced growth with investment in people is best.

Neither more nor fewer is automatically better. What matters is balance and how well people are educated, healthy and employed. A large skilled population, as in India, can be a great strength.

It depends on balance and the quality of human capital. Fast growth strains resources, services and jobs; shrinking brings labour shortages and an ageing population with high care costs.

• Many children, as in Nigeria or India in the past: more schools, teachers, child healthcare, vaccinations and nutrition schemes like midday meals, and later lots of new jobs.
• Many young adults, as in India today, where 65% are below 35: a need for colleges, skill training and jobs, housing and transport. Businesses grow in technology, retail and entertainment.
• Many elderly people, as in Japan or Italy: more hospitals, doctors, nurses, caregivers, old-age homes, pensions, ramps and lifts, and medicines. Jobs grow in healthcare and elder care, and robots may help with care and labour.

Many children call for schools and child healthcare; many young adults for colleges, skills and jobs (as in India); many elderly for hospitals, caregivers, pensions and accessible facilities (as in Japan).

Why families are smaller:

• More education, especially of women, and more women working.
• Lower child mortality: parents know their children will survive.
• The high cost of raising and educating children, and living in cities in smaller homes.
• Awareness and family planning (campaigns like "Hum do, humare do"), and later marriages.

Do fewer children mean better education and health? It helps: parents can spend more money, time and care on each child. But it is not guaranteed. It also depends on the family's income, the quality of schools and hospitals, and the parents' choices.

Effects:

• Families: more resources per child, healthier mothers and more working women. But fewer siblings and cousins, and more nuclear families. Fewer children to care for elderly parents, so old people may be lonely.
• Society: slower population growth and, in time, an ageing population. India's fertility has fallen from 5.7 in 1950 to 1.9 in 2025.

Families are smaller because of women's education and work, lower child deaths, costs and family planning. Fewer children help but do not guarantee better health and education. Effects: more care per child, but smaller kin networks, lonelier elderly, and an ageing society.

(a) Yes, greatly. It rose from about 41–43 years in 1950 to about 70 years now, and is projected to reach the high 70s by 2050. Reasons:

• better healthcare: hospitals, vaccinations and antibiotics;
• control of diseases like smallpox, malaria and polio;
• better nutrition and fewer famines;
• clean drinking water and sanitation;
• much lower child and maternal deaths;
• more education and awareness about health.

The graph also shows that females now live longer than males: the female line rose above the male line around the late 1970s.

(b) In 2010, males about 68 years and females about 71 years (read from the graph).

(a) Yes, from about 41–43 years in 1950 to about 70 today, thanks to better healthcare, vaccination, nutrition, sanitation and lower child mortality; women now outlive men. (b) In 2010, about 68 years for males and 71 years for females.

A demographic dividend is the economic benefit a country can gain when a large share of its people are of working age (roughly 15–64), with relatively fewer children and elderly people depending on them. India has this now: 65% of its people are below 35.

Benefits: more workers and earners, more savings and investment, more taxes, a bigger market, and faster economic growth, as in Japan, South Korea and China in their boom years.

What India must do before about 2050, while its population is still young:

• Quality education and skill training (vocational, digital and technical) that matches what employers need.
• Healthcare and nutrition, so that young people are fit and productive.
• Create jobs: manufacturing, small businesses and startups, and ease of doing business.
• More women in the workforce, with safe workplaces and child care.
• Infrastructure: roads, electricity, internet and housing.
• Plan pensions and elderly care for when today's young grow old.

Otherwise, a young population without jobs could become a burden instead of a dividend.

It is the boost to growth when a large share of people are of working age (in India, 65% are under 35). India must invest now in quality education, skills, health, jobs, women's work and infrastructure, and prepare for ageing.

Approximate figures for 2023–25:

Reasons for the differences:

• Japan became rich and urban earlier. It has excellent healthcare, highly educated women in the workforce, late marriages, high living costs, and long working hours, so it has fewer children and long lives.
• India is still developing. Its fertility fell later, and its health indicators are improving but still behind.

How ageing countries manage:

• encouraging births through child allowances, free child care and paid parental leave;
• raising the retirement age, and employing healthy seniors;
• robots and automation in factories and elder care;
• inviting foreign workers;
• strong pension and healthcare systems, and community care for the elderly.

(You can also compare Nigeria, which is very young with high fertility, with Italy, which is very old with low fertility.)

India is young and large (fertility about 2, life expectancy about 70, few elderly); Japan is old and shrinking (fertility about 1.2, life expectancy about 84, about 29% over 65), because of earlier development, healthcare, women's work and costs. Ageing countries use child support, later retirement, robots and migrant workers.

Migration Survey: Locality ______   Date ______
1. Name of the person: __________
2. Age: ____   Gender: ____
3. Occupation: __________
4. Present place of residence: __________
5. Place of birth / previous residence (village, town, state): __________
6. Number of years lived here: ____
7. Did you move alone or with family? ____
8. Main reasons for leaving your earlier place (tick all that apply):
  ☐ lack of jobs / limited job opportunities ☐ low income from farming ☐ lack of facilities (schools, hospitals, electricity, water) ☐ poor infrastructure (roads, transport) ☐ drought, flood or other disaster ☐ marriage ☐ other: ______
9. Main reasons for choosing this place: ☐ jobs ☐ higher wages ☐ education for children ☐ healthcare ☐ relatives or friends here ☐ other: ______
10. Is the move permanent, seasonal or temporary? ____
11. What challenges have you faced here (housing, cost of living, language, discrimination)? ____
12. Do you send money home? Do you plan to return? ____

After collecting the answers, tabulate them and show the most common reasons in a bar graph or pie chart.

A questionnaire covering name, age, occupation, residence, years lived here, origin, push factors (lack of jobs, facilities, infrastructure, disasters) and pull factors, type of move and challenges (a sample is given).

How to draw it on graph paper:

1. Draw a vertical line in the middle. Write the age groups up the centre, from 0–4 at the bottom to 80+ at the top.
2. Draw horizontal bars to the left for males and to the right for females, using a scale such as 1 cm = 1%.

Observations:

• The bars are widest at about 15–29 years (over 9% each), which shows India's large young working population.
• The bottom bars (0–14) are slightly narrower, showing that fewer children are now being born.
• The bars shrink steadily above 40, and only a small share of people is over 65.
• There are slightly more women than men in the older groups, because women live longer.

Draw male bars to the left and female bars to the right for each age group; the widest bars are at 15–29 years, the base is slightly narrower (falling births), and the top is thin with more older women than men.

• An inverted, top-heavy shape: the base (young children) is narrow and the middle and upper ages are wide, showing an ageing, shrinking population.
• Very few births: each age group below about 45 is smaller than the one above it, reflecting a very low fertility rate.
• Two bulges: around age 75 (people born just after World War II, the "baby boom") and around ages 50–55 (their children). Both large groups are moving towards old age.
• Many very old people, even above 90 and 100. Among the oldest, women far outnumber men, because women live longer.
• Implications: fewer workers in future, high pension and healthcare costs, and a need for robots, migrants, later retirement and support for families to have children.

Japan's pyramid is narrow at the base and wide at the top: very low births, a large and growing elderly population (bulges near 75 and 50–55), and more very old women than men, which means a shrinking workforce and high elder-care costs.