Human Geography: Population, Settlement and Culture

Human geography studies the spatial dimension of human activity — population, settlement, culture, economy, politics, and the human-environment relationship. It is the bridge between physical geography and the social sciences.

Population: distribution, density and growth

The world population reached 8 billion in November 2022 and is projected to peak around 10.4 billion in the 2080s (UN, 2024 revision). Distribution is highly uneven:

• ~60% of humanity lives in Asia.
• The four most populous countries are India, China, the United States, and Indonesia; Pakistan is fifth, with about 241 million people (2023 census).
• Population is concentrated on fertile river plains, coastal lowlands, and temperate latitudes between 20° and 60° N.

Density measures

• Arithmetic density — people per unit total area.
• Physiological density — people per unit arable land.
• Agricultural density — farmers per unit arable land.

Demographic Transition Model

The classical four/five-stage model:

Stage	Birth rate	Death rate	Growth	Example
1. Pre-industrial	High	High	Low	Pre-1750 Europe
2. Early industrial	High	Falling	Rapid	Sub-Saharan Africa today
3. Late industrial	Falling	Low	Slowing	Pakistan, Egypt today
4. Post-industrial	Low	Low	Stable	UK, USA
5. Decline	Very low	Slightly higher	Shrinking	Japan, Italy

Pakistan's Total Fertility Rate sat around 3.5 children per woman in 2023 — still well above replacement (~2.1) — placing it in late Stage 3.

Migration

E. G. Ravenstein's Laws of Migration (1885) still inform modern theory:

1. Most migration is short-distance.
2. Migration occurs in stages (rural → small town → big city).
3. Long-distance migrants tend to head to large urban centres.
4. Each main migration stream produces a counter-stream.
5. Urban-dwellers migrate less than rural-dwellers.
6. Women migrate more within a country; men more across borders.
7. Most migrants are young adults.
8. Large towns grow more by migration than by natural increase.

E. S. Lee's push-pull model (1966) classifies factors as push (poverty, conflict), pull (jobs, safety), intervening obstacles (cost, law, family) and personal factors.

Settlement geography

Settlements are conventionally classified as rural or urban by population threshold (varies by country — Pakistan typically uses 5,000+ for urban). Rural settlement patterns include nucleated, dispersed, linear, and clustered forms.

Christaller's Central Place Theory (1933)

Walter Christaller developed an idealised hexagonal model of settlement hierarchy, in which higher-order centres provide higher-order goods to nested lower-order settlements. Range (maximum distance a customer will travel) and threshold (minimum demand needed) jointly determine viable services. Despite its abstract assumptions, it underpins much retail-location and town-planning analysis.

Urban morphology models

• Burgess Concentric Zone Model (1925) — Chicago school; CBD, transition, working class, middle class, commuter zones.
• Hoyt Sector Model (1939) — sectors radiating outward along transport lines.
• Harris and Ullman Multiple Nuclei Model (1945) — multiple specialised centres.
• Latin American Model (Griffin-Ford, 1980) — adapted to colonial cities with a spine and elite sector.

Culture, language, religion

Cultural geography studies how culture occupies and shapes space — through language, religion, ethnicity, and material culture.

Languages

About 7,000 living languages; the largest by speakers are Mandarin, Spanish, English, Hindi, Arabic, Bengali, Portuguese, Russian, Urdu, Indonesian (varies by counting). The Indo-European, Sino-Tibetan, Afro-Asiatic, and Niger-Congo families dominate.

Pakistan's principal languages — Punjabi, Pashto, Sindhi, Saraiki, Urdu, Balochi — belong mostly to the Indo-European (Indo-Iranian) family; Brahui (Dravidian) is a notable outlier.

Religions

The largest world religions by adherents are Christianity (~2.4 billion), Islam (~2.0 billion), Hinduism (~1.2 billion), and Buddhism (~520 million). The Pew Research Center projects Islam to be the world's largest religion by ~2070.

Political geography

Topics include states, nations, boundaries, territorial integrity, and electoral geography. Friedrich Ratzel introduced organic theory of the state; Halford Mackinder's Heartland theory (1904) and Nicholas Spykman's Rimland theory (1944) remain classroom staples in geopolitics.

Pakistan's strategic geography — at the junction of South Asia, Central Asia, and the Middle East, with the Karakoram and Hindu Kush on one flank, the Arabian Sea on another — is a textbook case for Mackinder-Spykman analysis.

Human-environment interaction

Approaches range from environmental determinism (Ellen Semple) — environment determines culture — to possibilism (Vidal de la Blache) — environment offers possibilities, culture chooses. Modern political ecology, sustainability studies, and the Anthropocene debate frame human-environment relations in a more dialectical way.