Unit 6.6 — Causes of Migration, 1750–1900

Topic 6.4 already introduced indentured servitude as the labor system behind export economies. Topic 6.5 covered economic control without colonization. Topic 6.6 pulls back to ask a broader question: what specifically drove the massive scale of human movement — voluntary and forced — across the world from 1750 to 1900? The exam organizes causes into a small number of specific, testable categories rather than a vague "people moved for opportunity."

Push and pull factors: the basic framework

The exam's standard organizing tool sorts migration causes into two categories. Push factors are conditions driving people to leave their home region: insufficient jobs, poverty, famine, natural disasters, religious oppression, discrimination, and war. Pull factors are conditions drawing people toward a specific destination: job opportunities, education, existing family or community connections, and religious freedom. Nearly every migration case in this topic can be explained as some combination of a specific push and a specific pull — the strongest essays name both sides rather than only the reason people left or only the reason they chose a particular destination.

Demographic pressure: a specific, numeric cause

Population growth itself functioned as a genuine push factor, and the exam wants a concrete number here: Europe's population roughly doubled across the 19th century, from about 188 million in 1800 to 400 million by 1900. That surge outpaced available agricultural land and urban jobs in many regions, creating direct pressure to migrate — connecting directly back to Topic 5.9's urbanization and Topic 5.10's continuity of largely agrarian life outside industrial centers, since not every region's economy could absorb this much population growth internally.

Industrialization's dual pull: cities and colonies

Industrialization (Units 5–6) created labor demand in two distinct places worth distinguishing: it pulled people from rural areas into rapidly growing industrial cities within their own countries (internal, rural-to-urban migration, already previewed in Topic 5.9), and it pulled people across national borders entirely, toward industrializing nations and colonial territories that needed labor for factories, mines, and the export-economy plantations described in Topic 6.4.

Coerced and semi-coerced labor migration: not fully free movement

A precise point the exam tests directly: not all 19th-century migration was voluntary, and not all of it was fully coerced either — much of it fell into a genuine middle category. The new global capitalist economy relied heavily on indentured servitude, especially Chinese and Indian contract laborers (sometimes called "coolie" labor in period sources) recruited to work fixed-term contracts on plantations and infrastructure projects across the colonized world (Topic 6.4's Caribbean, Mauritius, and Fiji plantations). These workers technically signed contracts — distinguishing this system from outright chattel slavery (Topic 4.7) — but recruitment was frequently deceptive, and working conditions were often harsh enough that historians treat indentured servitude as semi-coerced migration rather than fully free choice. Convict labor, forcibly transported to colonial territories, supplied a further genuinely coerced migration stream. The exam wants you to place migration along a real spectrum — from choice-driven European migration to semi-coerced indentured servitude to fully coerced convict transport — rather than treating "migration" as one undifferentiated category.

Transportation technology as an enabling cause

None of this scale of movement was possible without Topic 5.5's steamships and railroads: they made migration dramatically faster, cheaper, and more flexible than earlier sail-and-wagon travel, and — a specific, testable nuance — they also enabled genuinely new circular migration patterns, where migrants could realistically return home periodically or permanently rather than committing to a one-way, irreversible move. This directly ties Topic 6.6 back to the technological engine introduced in Topic 5.5.

Why this matters for the exam

Topic 6.6 rewards naming a specific cause category (demographic pressure, industrial pull, coerced/semi-coerced labor, transportation technology) rather than a vague "people migrated for a better life." Keep the push/pull framework, the specific European population figures, and the free-to-coerced spectrum (voluntary migrants, indentured servants, convict labor) ready as precise, citable evidence — and expect this topic to connect directly into Topic 6.7's effects of that same migration.

Sources: Albert.io AP World History Review, OER Project — Industrialization and Migration.