World history
Compare ancient cities, empires, medieval societies, oceanic trade and industrial work through timelines, sources and historical examples.
- 1Ancient civilizationsThe first cities grew up beside rivers: the Tigris and Euphrates, the Nile, the Indus and the Yellow River. Eight units cover how those societies farmed, built, wrote, made laws and worked metal, with maps, timelines and flashcards. Dates before about 1000 BCE are approximate, and each unit says where scholars disagree.8 Units
- 2Greece and RomeFrom the Greek city-states of the 8th century BCE to the end of the western Roman empire in 476 CE. Eight units cover Sparta and the colonies, Athenian democracy, the Persian Wars, Alexander the Great, the Roman Republic, the empire, Roman engineering and the fall of the West, with maps, timelines and flashcards. Ancient numbers such as army sizes come from writers like Herodotus and are often disputed; each unit says so where it matters.8 Units
- 3Middle AgesFrom the end of the western Roman empire in 476 to the decades around 1500. Eight units cover Europe after Rome, Byzantium, the Islamic world and its scholars, lords and peasants, the Crusades, the Mongol empire, the Black Death and the end of the Middle Ages, with maps, timelines and flashcards. Numbers such as death tolls and army sizes are estimates, and each unit says where historians disagree.8 Units
- 4Age of explorationFrom the spice markets of the Indian Ocean in the 1400s to the new world maps of the 1500s. Seven units cover the spice trade, the instruments and ships that made long voyages possible, the voyages of da Gama, Columbus and Magellan, the Columbian exchange, the Atlantic slave trade, colonies and the people who resisted them, and the way the map of the world changed. Figures for the slave trade come from the Trans-Atlantic Slave Trade Database; other numbers are estimates and each unit says where historians disagree.7 Units
- 5Industrial revolutionFrom the first steam engines pumping water out of English mines in 1712 to electric light, cars on assembly lines and the carbon dioxide in today’s air. Seven units cover the steam engine, cotton mills, railways, life and work in industrial towns, child labour and the laws that limited it, electricity and the second industrial revolution, and what industry left behind. Dates and figures come from museum and archive sources named in each unit.7 Units
Changes in power, exchange and daily work
World history here is organized into courses that connect political institutions with trade, technology and ordinary life. A city, an empire, a trading route and a factory each raise different questions about how people organized their world. Timelines establish a sequence, but the text also asks what changed, who was involved and what evidence survives. Read the qualifications beside dates and stories rather than treating a memorable account as a complete explanation. The courses offer a starting structure for comparison, not a claim to cover every society equally.
Read the courses in a broad chronological order
Start with Ancient civilizations. Mesopotamia, Egypt, the Indus Valley and the Shang introduce different settings for early cities and states. Writing, Hammurabi’s laws, the wheel and the Bronze Age add questions about records, rules and technology. An introductory look at Greek city-states prepares for a more detailed comparison.
Greece and Rome considers Greek cities, Athenian democracy, the Persian Wars and Alexander before turning to the Roman Republic and Empire. Roman roads, aqueducts and concrete sit beside political history. The final unit specifically concerns the western empire, a distinction worth retaining as you continue.
Middle Ages follows Europe after Rome alongside Byzantium and the Islamic world. Lords and peasants, the Crusades, the Mongol empire and the Black Death broaden the comparison beyond a single kingdom. Use the different settings to ask which institutions and connections the period label includes.
Age of exploration examines the spice trade, navigation, voyages, the Columbian exchange, the Atlantic slave trade, colonies and resistance. Read trade and mapping together with coercion and resistance, rather than treating the course as a list of successful voyages.
Industrial revolution moves through steam engines, cotton mills, railways and industrial cities. Child labour and the Factory Acts accompany the technological account, followed by electricity and the changes industrialization left behind. Keep working conditions in view when explaining a new machine or production system.
Compare an institution rather than two labels
Use the timelines to locate events, then choose a specific question for comparison. Who participated in a political system? What did a technology change about work or transport? Which people carried the costs of an expanding trade? Figures, stories and unit questions provide material for an answer. Name the institution or process being compared instead of assuming that words such as democracy, empire or industry explain themselves.
Keep the limits of a source visible
The courses include source notes and qualifications alongside the narrative. Read them when a date is approximate, an account is traditional or a familiar story has been simplified. Separate what a source records from what a later explanation infers. When reviewing a unit, retell both the change it describes and the limits of the evidence. That is more useful than memorizing a confident sentence that leaves out the conditions attached to it.
Questions about this subject
Why did cities grow beside the rivers of Mesopotamia?
The southern plain received little rain but offered flat land, river water and fertile silt. Canals let farmers carry that water to fields and support more people than farming dependent on rainfall alone. Mesopotamia means between the rivers, referring to the Tigris and Euphrates, so the name itself identifies the landscape on which those settlements depended. Ancient civilizations
Why did people begin writing in ancient cities?
Managing stored goods and their distribution created a need for records. At Uruk, temple estates collected barley, wool and livestock and issued workers’ rations, helping lead to writing on clay tablets around 3300 BCE. Egyptian writing appeared around 3250 BCE for organizing goods as well, rather than beginning only as decoration on monuments. Ancient civilizations
Why was the Nile important to ancient Egyptian farming?
Most of Egypt received almost no rain, leaving farmland concentrated along the river and its delta. Summer floods spread over the valley and deposited dark silt, renewing the narrow cultivated strip. The flooding was driven by rains far south in the Ethiopian highlands, not by abundant rain falling directly on Egyptian fields each summer. Ancient civilizations
Why do dates for ancient Egyptian kingdoms differ between books?
Egyptians counted years by rulers’ reigns, and some reign lengths remain unknown. Historians reconstruct the sequence, so museums and textbooks can place the boundaries of the Old, Middle and New Kingdoms a few decades apart. Approximate dates signal that uncertainty rather than proving that every differently dated account describes a different historical event. Ancient civilizations
What shows that Indus cities used shared building practices?
Distant cities had matching bricks, weights and seals, evidence that helped archaeologists recognize one civilization across separate excavations. Houses used baked bricks with thickness, width and length in proportions of about one to two to four. Main streets crossed at right angles, and many washing areas connected to covered street drains, showing organized urban construction. Ancient civilizations