Ancient history

Cradles of civilization

The Bronze Age saw the development of cities and civilizations. Early civilizations arose close to rivers, first in Mesopotamia (3300 BCE) with the Tigris and Euphrates, followed by the Egyptian civilization along the Nile River (3200 BCE), the Norte Chico civilization in coastal Peru (3100 BCE), the Indus Valley civilization in Pakistan and northwestern India (2500 BCE), and the Chinese civilization along the Yangtze and Yellow Rivers (2200 BCE).

These societies developed a number of shared characteristics, including a central government, a complex economy and social structure, and systems for keeping records. These cultures variously invented the wheel, mathematics, bronze-working, sailing boats, the potter's wheel, woven cloth, construction of monumental buildings, and writing. Polytheistic religions developed, centered on temples where priests and priestesses performed sacrificial rites.

Writing facilitated the administration of cities, the expression of ideas, and the preservation of information. It may have independently developed in at least four ancient civilizations: Mesopotamia (3300 BCE), Egypt (around 3250 BCE), China (1200 BCE), and lowland Mesoamerica (by 650 BCE). The earliest system of writing was the Mesopotamian cuneiform script, which began as a system of pictographs, whose pictorial representations eventually became simplified and more abstract. Other influential early writing systems include Egyptian hieroglyphs and the Indus script. In China, writing was first used during the Shang dynasty (1766–1045 BCE).

Transport was facilitated by waterways, including rivers and seas, which fostered the projection of military power and the exchange of goods, ideas, and inventions. The Bronze Age also saw new land technologies, such as horse-based cavalry and chariots, that allowed armies to move faster. Trade became increasingly important as urban societies exchanged manufactured goods for raw materials from distant lands, creating vast commercial networks and the beginnings of archaic globalization. Bronze production in Southwest Asia, for example, required the import of tin from as far away as England.

The growth of cities was often followed by the establishment of states and empires. In Egypt, the initial division into Upper and Lower Egypt was followed by the unification of the whole valley around 3100 BCE. Around 2600 BCE, the Indus Valley civilization built major cities at Harappa and Mohenjo-daro. Mesopotamian history was characterized by frequent wars between city-states, leading to shifts in hegemony from one city to another. In the 25th–21st centuries BCE, the empires of Akkad and the Neo-Sumerians arose in this area. In Crete, the Minoan civilization emerged by 2000 BCE and is regarded as the first civilization in Europe.

Over the following millennia, civilizations developed across the world. By 1600 BCE, Mycenaean Greece began to develop. It flourished until the Late Bronze Age collapse that affected many Mediterranean civilizations between 1300 and 1000 BCE. The foundations of many cultural aspects in India were laid in the Vedic period (1750–600 BCE), including the emergence of Hinduism. From around 550 BCE, many independent kingdoms and republics known as the Mahajanapadas were established across the subcontinent.

Speakers of the Bantu languages began expanding across Central, Eastern, and Southern Africa as early as 3000 BCE until 1000 CE. Their expansion and encounters with other groups resulted in the displacement of the Pygmy peoples and the Khoisan, and in the spread of mixed farming and ironworking throughout sub-Saharan Africa, laying the foundations for later states.

The Lapita culture emerged in the Bismarck Archipelago near New Guinea around 1500 BCE and colonized many uninhabited islands of Remote Oceania, reaching as far as Samoa by 700 BCE.

In the Americas, the Norte Chico culture emerged in Peru around 3100 BCE. The Norte Chico built public monumental architecture at the city of Caral, dated 2627–1977 BCE. The later Chavín polity is sometimes described as the first Andean state, centered on the religious site at Chavín de Huantar. Other important Andean cultures include the Moche, whose ceramics depict many aspects of daily life, and the Nazca, who created animal-shaped designs in the desert called Nazca lines. The Olmecs of Mesoamerica developed by about 1200 BCE and are known for the colossal stone heads that they carved from basalt. They also devised the Mesoamerican calendar that was used by later cultures such as the Maya and Teotihuacan. Societies in North America were primarily egalitarian hunter-gatherers, supplementing their diet with the plants of the Eastern Agricultural Complex. They built earthworks such as Watson Brake (4000 BCE) and Poverty Point (3600 BCE), both in Louisiana.

Axial Age

From 800 to 200 BCE, the Axial Age saw the emergence of transformative philosophical and religious ideas that developed in many different places mostly independently of each other. Chinese Confucianism, Indian Buddhism and Jainism, and Jewish monotheism all arose during this period. Persian Zoroastrianism began earlier, perhaps around 1000 BCE, but was institutionalized by the Achaemenid Empire during the Axial Age. New philosophies took hold in Greece during the 5th century BCE, epitomized by thinkers such as Plato and Aristotle. The first Olympic Games were held in 776 BCE, marking a period known as "classical antiquity". In 508 BCE, the world's first democratic system of government was instituted in Athens.

Axial Age ideas shaped subsequent intellectual and religious history. Confucianism was one of the three schools of thought that came to dominate Chinese thinking, along with Taoism and Legalism. The Confucian tradition, which would become particularly influential, looked for political morality not to the force of law but to the power and example of tradition. Confucianism would later spread to Korea and Japan. Buddhism reached China in about the 1st century CE and spread widely, with 30,000 Buddhist temples in northern China alone by the 7th century CE. Buddhism became the main religion in much of South, Southeast, and East Asia. The Greek philosophical tradition diffused throughout the Mediterranean world and as far as India, starting in the 4th century BCE after the conquests of Alexander the Great of Macedon. Both Christianity and Islam developed from the beliefs of Judaism.

Regional empires

The millennium from 500 BCE to 500 CE saw a series of empires of unprecedented size develop. Well-trained professional armies, unifying ideologies, and advanced bureaucracies created the possibility for emperors to rule over large domains whose populations could attain numbers upwards of tens of millions of subjects. International trade also expanded, most notably the massive trade routes in the Mediterranean Sea, the maritime trade web in the Indian Ocean, and the Silk Road.

The kingdom of the Medes helped to destroy the Assyrian Empire in tandem with the nomadic Scythians and the Babylonians. Nineveh, the capital of Assyria, was sacked by the Medes in 612 BCE. The Median Empire gave way to successive Iranian states, including the Achaemenid (550–330 BCE), Parthian (247 BCE – 224 CE), and Sasanian Empires (224–651 CE).

Two major empires began in modern-day Greece. In the late 5th century BCE, several Greek city states checked the Achaemenid Persian advance in Europe through the Greco-Persian Wars. These wars were followed by the Golden Age of Athens, the seminal period of ancient Greece that laid many of the foundations of Western civilization, including the first theatrical performances. The wars led to the creation of the Delian League, founded in 477 BCE, and eventually the Athenian Empire (454–404 BCE), which was defeated by a Spartan-led coalition during the Peloponnesian War. Philip of Macedon unified the Greek city-states into the Hellenic League and his son Alexander the Great (356–323 BCE) founded an empire extending from present-day Greece to India. The empire divided into several successor states shortly after his death, resulting in the founding of many cities and the spread of Greek culture throughout conquered regions, a process referred to as Hellenization. The Hellenistic period lasted from the death of Alexander in 323 BCE until 31 BCE, when Ptolemaic Egypt fell to Rome.

In Europe, the Roman Republic was founded in the 6th century BCE and began expanding its territory in the 3rd century BCE. Prior to this, the Carthaginian Empire had dominated the Mediterranean, however lost three successive wars to the Romans. The Republic became an empire and by the time of Augustus (63 BCE – 14 CE), it had established dominion over most of the Mediterranean Sea. The empire continued to grow and reached its peak under Trajan (53–117 CE), controlling much of the land from England to Mesopotamia. The two centuries that followed are known as the Pax Romana, a period of unprecedented peace, prosperity, and political stability in most of Europe. Christianity was legalized by Constantine I in 313 CE after three centuries of imperial persecution. It became the sole official religion of the empire in 380 CE while the emperor Theodosius outlawed pagan religions in 391–392 CE.

In South Asia, Chandragupta Maurya founded the Maurya Empire (320–185 BCE), which flourished under Ashoka the Great. From the 4th to 6th centuries CE, the Gupta Empire oversaw the period referred to as ancient India's golden age. The resulting stability helped usher in a flourishing period for Hindu and Buddhist culture in the 4th and 5th centuries, as well as major advances in science and mathematics. In South India, three prominent Dravidian kingdoms emerged: the Cheras, Cholas, and Pandyas.

In China, Qin Shi Huang put an end to the chaotic Warring States period by uniting all of China under the Qin dynasty (221–206 BCE). Qin Shi Huang was an adherent of the Legalist school of thought and he displaced the hereditary aristocracy by creating an efficient system of administration staffed by officials appointed according to merit. The harshness of the Qin dynasty led to rebellions and the dynasty's fall. It was followed by the Han dynasty (202 BCE – 220 CE), which combined the Legalist bureaucratic system with Confucian ideals. The Han dynasty was comparable in power and influence to the Roman Empire that lay at the other end of the Silk Road. As economic prosperity fueled their military expansion, the Han conquered parts of Mongolia, Central Asia, Manchuria, Korea, and northern Vietnam. As with other empires during the classical period, Han China advanced significantly in the areas of government, education, science, and technology. The Han invented the compass, one of China's Four Great Inventions.

In Africa, the Kingdom of Kush prospered through its interactions with both Egypt and sub-Saharan Africa. It ruled Egypt as the Twenty-fifth Dynasty from 712 to 650 BCE, then continued as an agricultural and trading state based in the city of Meroë until the fourth century CE. The Kingdom of Aksum, centered in present-day Ethiopia, established itself by the 1st century CE as a major trading empire, dominating its neighbors in South Arabia and Kush and controlling the Red Sea trade. It minted its own currency and carved enormous monolithic stelae to mark its emperors' graves.

Successful regional empires were also established in the Americas, arising from cultures established as early as 2500 BCE. In Mesoamerica, vast pre-Columbian societies were built, the most notable being the Zapotec civilization (700 BCE – 1521 CE), and the Maya civilization, which reached its highest state of development during the Mesoamerican classic period (c. 250–900 CE), but continued throughout the post-classic period. The great Maya city-states slowly rose in number and prominence, and Maya culture spread throughout the Yucatán and surrounding areas. The Maya developed a writing system and used the concept of zero in their mathematics. West of the Maya area, in central Mexico, the city of Teotihuacan prospered due to its control of the obsidian trade. Its power peaked around 450 CE, when its 125,000–150,000 inhabitants made it one of the world's largest cities.

Technology developed sporadically in the ancient world. There were periods of rapid technological progress, such as the Greco-Roman era in the Mediterranean region. Greek science, technology, and mathematics are generally considered to have reached their peak during the Hellenistic period, typified by devices such as the Antikythera mechanism. There were also periods of technological decay, such as the Roman Empire's decline and fall and the ensuing early medieval period. Two of the most important innovations were paper (China, 1st and 2nd centuries CE) and the stirrup (India, 2nd century BCE and Central Asia, 1st century CE), both of which diffused widely throughout the world. The Chinese learned to make silk and built massive engineering projects such as the Great Wall of China and the Grand Canal. The Romans were also accomplished builders, inventing concrete, perfecting the use of arches in construction, and creating aqueducts to transport water over long distances to urban centers.

Most ancient societies practiced slavery, which was particularly prevalent in Athens and Rome, where slaves made up a large proportion of the population and were foundational to the economy. Patriarchy was also common, with men controlling more political and economic power than women.

Declines, falls, and resurgence

The ancient empires faced common problems associated with maintaining huge armies and supporting a central bureaucracy. In Rome and Han China, the state began to decline, and barbarian pressure on the frontiers hastened internal dissolution. The Han dynasty fell into civil war in 220 CE, beginning the Three Kingdoms period, while its Roman counterpart became increasingly decentralized and divided about the same time in what is known as the Crisis of the Third Century. From the Eurasian steppe, horse-based nomads dominated a large part of the continent. The development of the stirrup and the use of horse archers made the nomads a constant threat to sedentary civilizations.

In the 4th century CE, the Roman Empire split into western and eastern regions, with usually separate emperors. The Western Roman Empire fell in 476 CE to German influence under Odoacer in the Migration Period of the Germanic peoples. The Eastern Roman Empire, known as the Byzantine Empire, was more long-lasting. In China, dynasties rose and fell, but, in sharp contrast to the Mediterranean-European world, political unity was always eventually restored. After the fall of the Eastern Han dynasty and the demise of the Three Kingdoms, nomadic tribes from the north began to invade, causing many Chinese people to flee southward.