World History
Civilizations and connections
Organize world history around the interaction of societies, not a parade of isolated kingdoms. River valley civilizations (Mesopotamia, Egypt, the Indus, the Yellow River) arose from irrigation agriculture, surplus, and specialization. Classical empires (Persian, Greek, Roman, Mauryan, Han) built roads, law codes, and bureaucracies that outlasted them. Trade networks are the connective tissue: the Silk Roads moved goods, technologies, and Buddhism; Indian Ocean trade carried Islam and monsoon-driven commerce; trans-Saharan routes linked West African gold to Mediterranean markets.
Transformations
Feudalism and manorialism structured medieval Europe while the Islamic world and Song China produced major scholarly and technological advances. The Renaissance and Reformation reshaped European thought and religion; the Columbian Exchange after 1492 transferred crops, animals, and diseases, devastating Indigenous populations and fueling the Atlantic slave trade. Absolutism and constitutionalism competed, the Enlightenment supplied revolutionary vocabulary, and the Industrial Revolution began in Britain with coal, capital, colonies, and agricultural surplus.
Modern era
Industrialization powered imperialism and both world wars; the Cold War divided the globe; decolonization created new states; globalization deepened economic and cultural exchange.
Traps
Beware Eurocentrism (assuming European developments drove all change), single-cause explanations, and date confusion between the two world wars and between the Atlantic revolutions (American 1776, French 1789, Haitian 1791, Latin American movements after 1810). Do not conflate the Reformation with the Renaissance or the Columbian Exchange with the Silk Roads.
Rule of thumb
For any exchange or invention, ask who moved it, along which route, and what changed on both ends. Worked example: gunpowder travels from China along Mongol-facilitated routes to Europe, transforming warfare and state centralization there.