Causes of Migration: Push, Pull, and Ravenstein's Laws

• Distinguish between push factors and pull factors and give examples of each from at least four categories (economic, political, environmental, family).
• Recite at least five of Ravenstein's Laws of Migration and apply each to a current example.
• Distinguish among refugees, asylum seekers, and internally displaced persons using legal definitions.
• Explain the difference between forced and voluntary migration and identify ambiguous cases.
• Describe at least three current major migration flows (Syria, Venezuela, Mexico-US, Ukraine) and the dominant push and pull factors for each.

Migration is the movement of people from one place to another with the intent to settle permanently or semi-permanently. Geographers separate it from short-term travel (tourism, business trips), seasonal labor circulation, and daily commuting. The UN counts roughly 280 million international migrants today — about 3.6 percent of humanity — and roughly 40 million internally displaced persons who have moved within their own country.

Almost every migration decision combines push factors from the place of origin and pull factors from the destination. A young Honduran heading to the US faces gang violence at home (push) and family already established in Houston (pull). A Polish engineer moving to London faces stagnant wages (push) and a stronger pound (pull). The push-pull frame, articulated by Everett Lee in 1966, is the AP exam's preferred analytical structure.

The legal classification matters too. Voluntary migration is movement chosen for economic, family, or lifestyle reasons. Forced migration is movement compelled by violence, persecution, or environmental disaster. The 1951 UN Refugee Convention defines a refugee as someone who has crossed an international border due to "well-founded fear of persecution." Refugees enjoy specific legal protections, especially the principle of non-refoulement — the right not to be forcibly returned to a country where they face persecution.

Three other categories complicate the picture. An asylum seeker has applied for refugee status but not yet been adjudicated. An internally displaced person (IDP) has been forced to flee but remains within national borders — the largest IDP populations today are in Syria, Sudan, the DRC, Colombia, and Ukraine. Climate migrants or "environmental refugees" are not formally recognized under the 1951 Convention, leaving an estimated 200 million projected climate-displaced people in legal limbo by 2050.

Push and pull factors operate at every scale. A villager moves to a regional town for work (rural-urban). A Brazilian software engineer moves to São Paulo for a tech job (interregional). An Indian doctor moves to the UK for higher pay and a path to citizenship (international). The same factors recur; the magnitude and the legal apparatus change.

In 1885, British geographer Ernst Ravenstein published 11 generalizations about migration based on UK census data. They remain influential and frequently appear on AP exams. Five of the most testable:

Note: Law 6 is partly outdated — women now make up roughly half of international migrants globally, and in some flows (Filipino domestic workers, Eastern European nurses) they dominate. The AP exam still expects students to know the original formulation.

1. The 1951 Refugee Convention defines a refugee as someone fleeing persecution. Should the definition be expanded to cover climate refugees, gang-violence refugees, or extreme-poverty refugees? Defend a clear position.
2. Ravenstein's Law 6 (women short-distance, men long-distance) was based on 1885 UK data. Cite two modern migration flows that contradict it.
3. Of Syria, Venezuela, Mexico-US, and Ukraine, which migration flow has been handled most effectively by the international community? Justify your answer.
4. Step migration (Ravenstein's Law 2) is highly visible in 19th-century data. Is it still common today, or has cheap air travel made it obsolete?
5. Pick one push factor and one pull factor. For each, identify a counterexample — a case where that factor was present but did not produce migration. What does the counterexample reveal?

Draft alignment — pending educator review. AP HG codes correspond to the official College Board Course and Exam Description (Effective Fall 2020, V.1). Statements below are paraphrased in CountryReports' own voice; refer to the College Board's published CED for verbatim wording.

AP® and Advanced Placement® are registered trademarks of the College Board. The College Board was not involved in the production of this material and does not endorse it. Standards statements above are paraphrased; codes refer back to the official College Board CED, the NCSS C3 Framework, the Common Core State Standards, and other cited frameworks.