AP World History: Modern Key Terms & Vocabulary

124 essential AP World History: Modern terms, defined — aligned to the College Board CED.

A
Abbasid Caliphate: Islamic caliphate (750–1258) centered in Baghdad. Golden Age of science, philosophy, and trade. Fell to the Mongols in 1258.
abolitionism: Movement to end slavery. Driven by Enlightenment ideals, religious arguments, and the work of formerly enslaved people like Frederick Douglass.
Akbar: Greatest Mughal emperor (r. 1556–1605). Known for religious tolerance, administrative reforms, and creating a diverse, unified empire.
American Revolution: Colonial rebellion (1775–1783) that created the United States. Inspired by Enlightenment ideas of natural rights and limited government.
apartheid: South Africa's system of racial segregation (1948–1994) that denied Black South Africans basic rights. Ended through sustained resistance led by Nelson Mandela.
Aztec Empire: Mesoamerican empire (c.1300–1521) centered at Tenochtitlán. Grew through conquest and tribute. Fell to Hernán Cortés and his Indigenous allies in 1521.
B
Berlin Conference: 1884–1885 meeting where European powers divided Africa among themselves — without African input. Established colonial boundaries still affecting Africa today.
Black Death: The bubonic plague pandemic (1347–1353) that killed 30–60% of Europe's population. Spread along Silk Road trade routes; permanently transformed European society.
bourgeoisie: The middle/capitalist class in Marxist theory — people who own the means of production (factories, land) and profit from workers' labor.
bubonic plague: The disease that caused the Black Death. Spread by fleas on rats. Caused massive depopulation and social upheaval across Eurasia.
Buddhism: Religion founded in ancient India on the Four Noble Truths and Eightfold Path. Spread across Asia along trade routes; took on different forms in different places.
Byzantine Empire: The eastern half of the Roman Empire that survived until 1453. Preserved Greek and Roman learning; spread Orthodox Christianity.
C
caliphate: Islamic government led by a caliph (successor to Muhammad). Major caliphates: Umayyad, Abbasid, Ottoman.
caravanserai: Rest stops along the Silk Roads where merchants could sleep, trade, and restock. Made long-distance overland trade possible.
cash crop: A crop grown for export and profit rather than local food supply. Colonial powers forced colonized peoples to grow cash crops (cotton, rubber, cocoa), disrupting local agriculture.
casta system: Spanish colonial racial hierarchy in the Americas, with Spanish-born colonists at the top, followed by those of mixed ancestry, Indigenous people, and enslaved Africans.
chattel slavery: System of slavery where enslaved people are treated as personal property that can be bought, sold, and inherited. The basis of the transatlantic slave trade.
Chinese Communist Revolution: Mao Zedong's victory over the Nationalists in 1949. Established the People's Republic of China — transforming the world's most populous nation.
civil service exam: Chinese system of hiring government officials based on test scores, not birth. Reduced aristocratic power and created a merit-based bureaucracy.
climate change: Long-term shifts in global temperatures and weather patterns, largely caused by human burning of fossil fuels. Major challenge for 21st-century global governance.
Cold War: The geopolitical standoff (1947–1991) between the US-led capitalist West and Soviet-led communist East. Shaped global politics through proxy wars and nuclear threat.
Columbian Exchange: The massive transfer of plants, animals, diseases, people, and ideas between the Americas and Afro-Eurasia after 1492. Permanently transformed both worlds.
Confucianism: Chinese philosophy emphasizing social harmony, respect for authority, and moral virtue. Shaped East Asian governments and family life for centuries.
Crusades: Christian military campaigns (1096–1291) to recapture Jerusalem from Muslim rulers. Increased trade and cultural exchange between Europe and the Islamic world.
D
Dar al-Islam: The 'House of Islam' — the interconnected Muslim world spanning from Spain to Southeast Asia. Enabled massive trade and cultural exchange.
decolonization: The wave of independence movements that ended European colonial empires after WWII (1940s–1970s). Over 80 new nations were created.
Delhi Sultanate: Muslim sultanate in northern India (1206–1526). Introduced Islamic law and culture to the subcontinent; later replaced by the Mughal Empire.
devshirme: Ottoman system of taking Christian boys from conquered lands, converting them to Islam, and training them as elite soldiers (Janissaries) or bureaucrats.
dhow: Arab sailing vessel used in Indian Ocean trade. Designed to harness monsoon winds for fast, reliable voyages.
diaspora: A population dispersed from its original homeland, maintaining a shared cultural identity. Examples: African diaspora, Chinese diaspora, Indian diaspora.
diasporic community: A community of people living outside their homeland, often formed by merchants who settled along trade routes to facilitate commerce.
digital revolution: The transformation of technology, communication, and economies through computers, the internet, and smartphones — the Information Age.
Dutch East India Company: VOC — the world's first multinational corporation (1602). Dominated Indian Ocean trade and established Dutch colonies in Asia.
E
encomienda: Spanish colonial labor system: Spanish colonizers (encomenderos) were given Indigenous laborers to work mines and plantations in exchange for converting them to Christianity.
Enlightenment: 18th-century intellectual movement emphasizing reason, science, and individual rights. Inspired the American, French, and Haitian revolutions.
F
fascism: Authoritarian ideology emphasizing extreme nationalism, military power, and state over individual rights. Emerged in Italy and Germany between the World Wars.
feminism: Movement advocating for equal rights and opportunities for women. First wave focused on voting rights (suffrage); emerged alongside democratic and industrial revolutions.
feudalism: Medieval European system where lords gave land to knights in exchange for military service, and peasants (serfs) worked the land in exchange for protection.
filial piety: Confucian value of deep respect for parents and ancestors. Central to Chinese family structure and society.
French Revolution: Radical political transformation (1789–1799) that abolished the monarchy, executed the king, and established a republic based on liberty, equality, and fraternity.
G
Gandhi: Indian independence leader who used nonviolent resistance (satyagraha) against British colonial rule. Led India to independence in 1947.
Genghis Khan: Founder of the Mongol Empire. United Mongol tribes, then conquered massive territories through military genius and terror. His campaigns killed millions.
globalization: The increasing interconnectedness of the world's economies, cultures, and populations through trade, technology, and migration.
Great Zimbabwe: Powerful sub-Saharan African kingdom (c.1100–1450) that grew rich from gold and cattle trade. Its stone structures show sophisticated political organization.
Green Revolution: Mid-20th century agricultural transformation using high-yield crop varieties, fertilizers, and irrigation. Dramatically increased food production but also raised concerns about inequality and environmental impact.
gunpowder empires: Term for the Ottoman, Safavid, and Mughal empires — land-based states that used gunpowder weapons (cannons, muskets) to conquer and hold territory.
H
hacienda: Large Spanish colonial plantation. Replaced the encomienda as the main agricultural labor system in Latin America.
Haitian Revolution: The only successful enslaved people's revolution (1791–1804). Haiti became the first Black republic, inspired by Enlightenment ideals and French revolutionary chaos.
Hinduism: Ancient Indian religion centered on dharma (duty), karma (actions and consequences), and the caste system. Dominant in South and Southeast Asia.
Holocaust: Nazi Germany's systematic genocide of 6 million Jews and millions of others (Roma, disabled, LGBTQ+). A defining moral catastrophe of the 20th century.
I
Ibn Battuta: Muslim traveler from Morocco who visited nearly every Muslim-majority region in the 14th century, leaving detailed accounts of the Islamic world.
imperialism: The policy of extending a nation's power through colonization, military force, or economic domination. European powers colonized most of Asia and Africa in the 19th century.
Inca Empire: South American empire (c.1438–1533) stretching along the Andes. Famous for its road network, mita labor system, and quipu record-keeping. Fell to Francisco Pizarro.
Indian Ocean trade: The world's largest pre-modern trade network, connecting East Africa, Arabia, India, and Southeast Asia via monsoon winds. Spread goods, religions, and ideas.
Industrial Revolution: The transformation from agricultural to industrial economies, beginning in Britain c.1760. Powered by steam, factories, and coal. Reshaped global society.
International Monetary Fund: IMF — international organization that provides loans to nations with balance-of-payments problems, often with conditions attached (structural adjustment).
Islam: Monotheistic religion founded by Muhammad in 7th-century Arabia. Spread rapidly through conquest and trade; shaped law, culture, and government across Afro-Eurasia.
J
Janissaries: Elite Ottoman infantry made up of enslaved soldiers trained from childhood. Among the world's most effective military forces in the 15th–17th centuries.
joint-stock company: Business where investors pool money and share profits and risks. Used by European powers to fund expensive overseas trade and colonization (e.g., Dutch East India Company).
K
Karl Marx: German philosopher who developed Marxism: the idea that history is driven by class struggle and that capitalism would eventually be replaced by communism.
khanate: Division of the Mongol Empire after Genghis Khan's death. Major khanates: Yuan (China), Ilkhanate (Persia), Golden Horde (Russia), Chagatai (Central Asia).
Korean War: Conflict (1950–1953) between US-backed South Korea and Soviet/Chinese-backed North Korea. Ended in stalemate at the 38th parallel — still technically unresolved.
L
laissez-faire: Economic policy of minimal government interference in the economy. Let the market self-regulate. Dominant in 19th-century Britain and the United States.
Lenin: Leader of the Bolshevik Revolution and first head of the Soviet Union. Implemented communism through a one-party state and state control of the economy.
liberation theology: Latin American religious movement combining Christianity with advocacy for the poor and social justice. Opposed authoritarian regimes in the 20th century.
M
Mali Empire: West African empire (c.1235–1600) famous for its gold and salt trade. Mansa Musa's pilgrimage to Mecca displayed its enormous wealth to the world.
Mansa Musa: Emperor of Mali (r. 1312–1337). His lavish pilgrimage to Mecca in 1324 — with 60,000+ people and tons of gold — put West Africa on the world map.
Mao Zedong: Leader of Communist China (1949–1976). His policies (Great Leap Forward, Cultural Revolution) killed tens of millions while attempting rapid modernization.
Marco Polo: Italian merchant who traveled to China in the 1270s and wrote about his experiences. His accounts introduced Europe to Mongol China.
Marshall Plan: US program (1948) that provided $12 billion to rebuild Western Europe after WWII. Also aimed to prevent the spread of communism.
Martin Luther: German monk who started the Protestant Reformation (1517) by challenging Catholic practices, especially the selling of indulgences.
Meiji Restoration: Japan's rapid modernization after 1868. Japan industrialized, built a Western-style military, and became an imperial power — avoiding colonization by the West.
mercantilism: Economic theory that nations should maximize exports and minimize imports to accumulate wealth. Justified colonialism and trade monopolies.
mestizo: Person of mixed European and Indigenous American ancestry. Became a significant social group in Spanish colonial societies.
microfinance: Small loans given to poor individuals (often women) in developing countries to start or expand businesses. Pioneered by Muhammad Yunus and the Grameen Bank.
Middle Passage: The brutal trans-Atlantic voyage from Africa to the Americas. Enslaved Africans were packed into ships in horrific conditions; mortality rates were extremely high.
migration: The movement of people from one region to another, driven by push factors (poverty, violence, climate) and pull factors (jobs, safety, opportunity).
mita: Inca labor tax: communities owed labor service to the state. Later adopted by Spanish colonizers for brutal forced labor in mines.
Mongol Empire: The largest contiguous land empire in history (1206–1368), founded by Genghis Khan. United Eurasia under one rule, enabling trade and cultural exchange (Pax Mongolica).
monsoon winds: Seasonal wind patterns that enabled predictable sailing across the Indian Ocean. The foundation of Indian Ocean trade.
Mughal Empire: Muslim empire in India (1526–1857). At its peak under Akbar, it controlled most of the subcontinent and blended Hindu and Islamic cultures.
multinational corporation: A company that operates in multiple countries, often headquartered in wealthy nations but manufacturing in low-wage developing nations.
N
nationalism: The belief that people sharing a culture, language, or history should have their own independent state. Drove revolutions, unifications, and decolonization movements.
Nelson Mandela: South African anti-apartheid activist, imprisoned for 27 years, then elected as South Africa's first Black president (1994). Symbol of justice and reconciliation.
New Imperialism: The rapid expansion of European empires in Africa and Asia (c.1870–1914). Driven by industrial capitalism, nationalism, and racism.
nonaligned movement: Group of nations during the Cold War that refused to align with either the US or USSR. Led by India's Jawaharlal Nehru, Egypt's Nasser, and Yugoslavia's Tito.
O
Opium Wars: Two conflicts (1839–42, 1856–60) in which Britain forced China to open its markets to opium trade. Led to unequal treaties and humiliated the Qing Dynasty.
Ottoman Empire: Major Sunni Muslim empire (1299–1922) centered in Anatolia. Conquered Constantinople in 1453; controlled much of the Middle East, North Africa, and Southeast Europe.
P
pandemic: A disease outbreak that spreads globally. Historical examples: Black Death, 1918 flu, HIV/AIDS, COVID-19. Trade networks accelerate spread.
Pax Mongolica: Mongol Peace — the period (c.1250–1350) when Mongol control of Eurasia made the Silk Roads safe for travel and trade.
plantation system: Agricultural system using enslaved or coerced labor to grow cash crops (sugar, tobacco, cotton) for export. Drove the demand for enslaved Africans.
printing press: Invented by Gutenberg (c.1440). Enabled mass production of books, spreading Reformation ideas, scientific knowledge, and literacy across Europe.
proletariat: The working class in Marxist theory — people who own no means of production and sell their labor for wages.
Protestant Reformation: 16th-century religious movement started by Martin Luther challenging Catholic Church authority. Split Western Christianity and contributed to religious wars in Europe.
proxy war: A conflict between two superpowers fought indirectly through smaller nations. Examples: Korean War, Vietnam War, Afghanistan.
R
Russian Revolution: Two revolutions in 1917: February (overthrew the tsar) and October (Bolshevik takeover). Created the Soviet Union and established the world's first communist state.
S
Safavid Empire: Persian Shia Muslim empire (1501–1736). Promoted Shia Islam as the state religion; major rival to the Sunni Ottomans.
Scramble for Africa: The rapid colonization of Africa by European powers (1880s–1890s). By 1914, only Ethiopia and Liberia remained independent.
Sepoy Mutiny: 1857 Indian uprising against British East India Company rule. Failed, but led Britain to take direct control of India, establishing the British Raj.
settler colonialism: A form of colonization where settlers permanently displace and replace Indigenous populations (e.g., Australia, Canada, South Africa).
Silk Roads: Overland and maritime trade routes connecting China to the Mediterranean. Moved silk, spices, and ideas — including Buddhism, Islam, and the plague — across Eurasia.
social contract: Enlightenment idea (Locke, Rousseau) that governments derive their authority from the consent of the governed. Foundation of democratic theory.
Social Darwinism: Misapplication of Darwin's evolution theory to human societies: the idea that European dominance proved racial superiority. Used to justify imperialism.
Song Dynasty: Chinese dynasty (960–1279) known for explosive economic growth, Champa rice, advanced bureaucracy, and innovations like gunpowder, printing, and paper money.
steam engine: Key technology of the Industrial Revolution. Powered factories, railroads, and steamships — dramatically increasing production and transportation speed.
structural adjustment: Economic reforms demanded by IMF/World Bank in exchange for loans: cutting government spending, privatizing state companies, opening markets. Often worsened poverty in borrowing nations.
Suleiman the Magnificent: Greatest Ottoman sultan (r. 1520–1566). Expanded the empire to its peak, reformed laws, and patronized arts and architecture.
Swahili Coast: East African coastal region with city-states (Mombasa, Kilwa) that linked African gold and ivory to Indian Ocean trade networks. Blended African and Arab cultures.
T
Tang Dynasty: Chinese dynasty (618–907) that expanded trade on the Silk Roads, embraced cultural exchange, and developed a merit-based civil service exam.
totalitarianism: Political system where the state controls all aspects of public and private life. Examples: Stalin's USSR, Hitler's Germany, Mao's China.
transatlantic slave trade: The forced transportation of 12+ million Africans to the Americas from the 16th–19th centuries. The foundation of plantation economies in the New World.
Treaty of Versailles: 1919 peace treaty ending WWI. Blamed Germany for the war, imposed massive reparations, and stripped German territory. Fueled resentment leading to WWII.
trench warfare: Military tactic dominating WWI's Western Front. Soldiers fought from parallel trenches; millions died for minimal territorial gains.
triangular trade: Trade network connecting Europe, Africa, and the Americas. Europe → Africa (manufactured goods), Africa → Americas (enslaved people), Americas → Europe (raw materials).
Truman Doctrine: US policy (1947) to contain communism by supporting any nation threatened by Soviet influence. Foundation of US Cold War strategy.
U
unequal treaties: Agreements imposed on China (and other nations) by Western powers after military defeats. Gave foreigners special privileges and control over Chinese territory.
United Nations: International organization founded in 1945 to prevent future world wars, protect human rights, and foster international cooperation.
V
Vietnam War: US military involvement in Vietnam (1955–1975) to prevent communist North Vietnam from taking the South. The US withdrew in defeat; Vietnam unified under communism.
W
White Man's Burden: Racist ideology arguing that Europeans had a duty to 'civilize' non-European peoples. Used to justify colonialism as benevolent, not exploitative.
women's rights movement: Global movement for gender equality. Key gains: suffrage (voting rights), education access, legal equality. Progress uneven across regions.
World Trade Organization: WTO — international body that sets rules for global trade and resolves trade disputes. Founded 1995; promotes free trade.
World War I: Global war (1914–1918) triggered by the assassination of Archduke Franz Ferdinand. Killed 20 million; reshaped European empires and led directly to WWII.
World War II: Global war (1939–1945) caused by Nazi expansion and Japanese imperialism. Killed 70–85 million; ended with atomic bombs on Japan and the Holocaust's exposure.
Y
Yuan Dynasty: Mongol-ruled dynasty in China (1271–1368), founded by Kublai Khan. Connected China to global trade but maintained Mongol separation from Chinese society.

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