The story of Mexico begins with maize. Archaeological evidence at Guilá Naquitz cave in Oaxaca places domestication of teosinte into early maize between 7000 and 5000 BCE. By 1500 BCE agricultural surplus allowed permanent settlements across the central highlands and coastal plains. This single crop transformation created the caloric foundation for every subsequent civilization on Mexican soil.
The Olmec civilization emerged along the Gulf Coast between 1400 and 400 BCE, centered at San Lorenzo and La Venta in present-day Tabera and Veracruz states. They carved basalt heads weighing up to 50 tons, transported from the Tuxtla Mountains 100 kilometers distant. The Olmec established the Mesoamerican ballgame, developed the Long Count calendar system still used at later sites, and created the first hieroglyphic writing in the Western Hemisphere. Their trade networks extended from the Valley of Mexico to modern Guatemala. When San Lorenzo was systematically destroyed around 900 BCE, the center of power shifted to La Venta, which flourished until approximately 400 BCE before the culture dispersed without clear historical record of why.
Teotihuacán rose in the Valley of Mexico around 100 BCE and reached its apex between 150 and 450 CE. The city covered 37 square kilometers at maximum extent. The Pyramid of the Sun measures 225 meters per side at its base and rises 65 meters, making it the third largest pyramid by volume in the world. The Pyramid of the Moon anchors the northern end of the Avenue of the Dead, which runs 2.4 kilometers through the ceremonial core. Population estimates for Teotihuacán range from 125,000 to 200,000 inhabitants at its peak around 450 CE, making it larger than any European city of the same period. Multi-floor apartment compounds with sophisticated drainage and fresh water systems housed craft specialists organized by trade. The city controlled obsidian sources at Pachuca and Otumba, exporting blades and tools across Mesoamerica. Teotihuacán artistic and religious influence reached the Maya city of Tikal, 1,100 kilometers southeast, visible in architectural styles and carved monuments dating to the late 4th century. The city burned and depopulated between 550 and 650 CE. Archaeological evidence shows systematic destruction of temples and elite residences, but the identity of destroyers and their motives remain unknown. No written records from Teotihuacán survive.
Monte Albán dominated the Oaxaca Valley from its founding around 500 BCE until its decline after 800 CE. The Zapotec built the city on a mountaintop 400 meters above the valley floor, artificially flattening the summit to create a plaza measuring 300 by 200 meters. At its height around 500 CE, the urban core and surrounding settlements housed approximately 25,000 people. Building J, constructed around 100 BCE, contains carved glyphs identifying over 40 conquered territories. The Zapotec developed independent writing systems distinct from either Olmec or Maya scripts. Astronomical observations recorded at the site demonstrate sophisticated understanding of Venus cycles and zenith passages. Monte Albán controlled trade routes connecting the Valley of Mexico, the Gulf Coast, and the Pacific lowlands. The city gradually depopulated after 800 CE, and by 1000 CE the Zapotec had abandoned the mountaintop entirely, moving to valley floor settlements.
Maya civilization developed across the Yucatán Peninsula, Chiapas highlands, and Central American lowlands beginning around 2000 BCE. The Pre-Classic period from 2000 BCE to 250 CE saw establishment of agricultural villages and early ceremonial centers. El Mirador in Guatemala, built between 600 BCE and 100 CE, contains pyramids larger than those at Tikal. The Classic Maya period from 250 to 900 CE produced the civilization's greatest achievements in mathematics, astronomy, writing, and architecture. Palenque in Chiapas flourished between 600 and 740 CE under rulers including K'inich Janaab Pakal, who ruled from 615 to 683 CE. His tomb beneath the Temple of the Inscriptions, discovered in 1952, contained a carved sarcophagus lid depicting his descent into the underworld. Palenque's palace complex includes a four-story astronomical observatory tower unique in Maya architecture. The city controlled territory along the Usumacinta River and maintained trade and military alliances with Tikal and Calakmul. Bonampak, 30 kilometers from Yaxchilán, preserves interior murals painted around 790 CE showing warfare, captive sacrifice, and royal bloodletting ceremonies in detail found nowhere else in Maya art.
Calakmul in Campeche state rose as a major power during the Classic period, engaging in century-long competition with Tikal for control of central Maya trade routes. The city contains over 6,000 structures spread across 70 square kilometers. Structure 2, a pyramid complex, rises 45 meters and covers a base larger than any structure at Tikal. Stelae at Calakmul record dynastic history from the 5th through 9th centuries. The city reached maximum population near 50,000 around 700 CE. Calakmul formed alliances with multiple secondary centers to encircle and isolate Tikal politically and economically. In 562 CE, Calakmul's ruler Scroll Serpent orchestrated an attack on Tikal that captured or killed its king, initiating a 130-year hiatus in monument construction at Tikal. Competition between these two cities shaped Classic Maya politics until both collapsed during the 9th century.
The Maya developed a complete writing system of approximately 800 hieroglyphic signs combining logographic and syllabic elements. They calculated the solar year at 365.2420 days, within 0.0002 of the figure determined by modern astronomy. The Long Count calendar, adopted from earlier Olmec precedents, tracked days from a creation date calculated as August 11, 3114 BCE in the proleptic Gregorian calendar. Maya mathematics used a vigesimal system and independently developed the concept of zero as both placeholder and number. Astronomical tables at sites including Copán tracked Venus cycles, lunar eclipses, and zenith passages with accuracy enabling prediction centuries forward. The Dresden Codex, a bark-paper book produced around 1200 CE now held in Germany, contains astronomical tables, ritual calendars, and religious almanacs demonstrating mathematical sophistication unmatched elsewhere in the pre-Columbian Americas.
Between 800 and 1000 CE, southern Maya lowland cities depopulated rapidly. Tikal, Palenque, Copán, and dozens of smaller centers ceased monument construction, and populations declined by 80 to 90 percent. The collapse progressed from south to north over two centuries. Multiple factors contributed: prolonged droughts documented in lake sediment cores from the Yucatán, soil exhaustion from intensive agriculture, endemic warfare disrupting trade networks, and loss of elite legitimacy as rulers failed to maintain cosmic order through ritual. Northern Maya cities including Uxmal and Chichén Itzá continued to function during the Terminal Classic period from 800 to 1000 CE, absorbing refugees and trade from the collapsing south.
Chichén Itzá dominated northern Yucatán from approximately 750 to 1200 CE. The site shows architectural influence from central Mexico, particularly in the Castillo pyramid and the Temple of the Warriors with its columns and chacmool sculptures. The Ball Court at Chichén Itzá measures 168 meters long with walls rising 8 meters, the largest in Mesoamerica. Acoustic properties allow normal conversation at one end to be heard clearly at the other 135 meters distant. The Sacred Cenote, a natural sinkhole 60 meters in diameter, served as a pilgrimage destination where jade, gold, ceramics, and human remains were deposited as offerings. Dredging operations between 1904 and 1911 recovered thousands of artifacts. Whether Chichén Itzá was conquered by Toltec invaders from Tula or developed through trade and cultural exchange remains contested, but architectural parallels between the two sites 1,200 kilometers apart are undeniable.
Tula in Hidalgo state became the Toltec capital around 950 CE. The site features Pyramid B, topped by 4.6-meter stone warriors called Atlantean figures. Toltec culture emphasized military prowess, human sacrifice, and warrior societies including the Eagle and Jaguar knights. Chronicles written centuries later credited the Toltec ruler Topiltzin Quetzalcoatl with founding the city, but distinguishing historical figures from mythological accretions remains difficult. Tula controlled obsidian sources and trade routes connecting the Valley of Mexico with northern frontier regions. The city burned and was abandoned around 1150 CE. Later Aztec rulers claimed descent from Toltec nobility to legitimize their own rule.
The Mexica people, later called Aztecs, migrated into the Valley of Mexico during the 13th century. According to their origin narrative recorded in post-conquest codices, they departed from Aztlán, an island homeland of uncertain location, guided by their patron deity Huitzilopochtli. They arrived in the Valley of Mexico around 1250 CE as one of numerous Nahuatl-speaking groups competing for territory and resources. Other city-states including Texcoco, Tlacopan, Chalco, and Xochimilco already controlled the valley's prime agricultural land. The Mexica settled on swampy islands in Lake Texcoco where, according to their foundation myth, they saw an eagle perched on a cactus devouring a serpent, the sign indicating where they should build their city. They founded Tenochtitlan in 1325 CE on these islands, constructing chinampas, artificial agricultural platforms, in the shallow lake waters.
Tenochtitlan grew slowly for its first century. The Mexica served as mercenaries for more powerful city-states, particularly Azcapotzalco, the dominant power in the valley during the early 15th century. In 1428 CE, Tenochtitlan, allied with Texcoco and Tlacopan, overthrew Azcapotzalco. This Triple Alliance, with Tenochtitlan as senior partner, initiated Mexica imperial expansion. Under Itzcoatl, who ruled from 1428 to 1440, and his nephew Moctezuma I, who ruled from 1440 to 1469, Tenochtitlan extended control across the Valley of Mexico and into the Gulf Coast. Conquered cities paid tribute in goods and labor. The empire functioned through indirect rule, leaving local dynasties in place while extracting resources and requiring military support.
Tenochtitlan reached its maximum extent under Ahuitzotl, who ruled from 1486 to 1502, and Moctezuma II, who ruled from 1502 to 1520. The city covered approximately 13 square kilometers and housed between 200,000 and 300,000 inhabitants, making it larger than any European city of the period except Constantinople. Four main causeways connected the island city to the mainland. A dike 16 kilometers long separated fresh water from salt water within Lake Texcoco, and aqueducts brought drinking water from springs at Chapultepec. The Templo Mayor, the main temple pyramid, stood 60 meters high with twin temples dedicated to Tlaloc, the rain deity, and Huitzilopochtli, the war deity. Seven construction phases between 1325 and 1521 progressively enlarged the structure, with each rebuilding burying earlier versions. The marketplace at Tlatelolco, the northern district of Tenochtitlan, accommodated 60,000 traders daily according to Spanish accounts. The empire extracted tribute from 371 city-states stretching from the Gulf Coast to the Pacific, recorded in the Codex Mendoza compiled around 1541. Annual tribute included 7,000 tons of maize, 4,000 tons of beans, 4,000 tons of amaranth seed, 123,000 cotton garments, 800 bundles of cacao, jade, gold dust, feathers, and live eagles and jaguars.
Human sacrifice operated at a scale unprecedented in Mesoamerica. The Mexica believed the sun required nourishment through human blood to continue its daily journey. Captives taken in warfare provided the majority of sacrificial victims. The dedication of the rebuilt Templo Mayor in 1487 reportedly involved the sacrifice of thousands of captives over four days, though exact numbers remain disputed. Spanish accounts written decades later claim 80,000 victims, a figure most historians consider exaggerated. Archaeological excavations at Templo Mayor since 1978 have uncovered remains of human sacrifice including a wall of skulls called tzompantli, but preservation conditions in the urban center limit comprehensive skeletal analysis.
Hernán Cortés landed at Veracruz on April 21, 1519, leading an expedition of approximately 530 Spanish soldiers, 16 horses, and several small cannons. The governor of Cuba, Diego Velázquez, had authorized the expedition for trade and exploration, not conquest. Cortés exceeded his orders immediately, founding Villa Rica de la Vera Cruz and establishing a town council that reported directly to the Spanish Crown, bypassing Velázquez. He burned or disabled his ships to prevent desertion. At Cempoala, a Totonac city 40 kilometers north of Veracruz, local rulers subject to Mexica tribute demands allied with Cortés. As the Spanish moved inland, their indigenous allies grew. Tlaxcala, a city-state that had resisted Mexica conquest for decades, fought Spanish forces in several battles during September 1519, then allied with them. Tlaxcalan warriors would outnumber Spanish soldiers throughout the conquest.
Cortés entered Tenochtitlan on November 8, 1519. Moctezuma II received him and housed the Spanish in the palace of Axayacatl. Spanish accounts describe the meeting in detail, but no independent Nahuatl account survives from Moctezuma's perspective. Within days, Cortés seized Moctezuma as hostage. The emperor continued to govern through Spanish oversight, but his authority eroded. In May 1520, Cortés left Tenochtitlan to confront a Spanish force sent by Velázquez to arrest him. During his absence, Pedro de Alvarado, commanding the Spanish garrison, massacred Mexica nobles during a religious ceremony at Templo Mayor. The city erupted. When Cortés returned on June 24, 1520, Mexica forces had besieged the Spanish in Axayacatl's palace. Moctezuma died on June 29, either killed by Spanish captors or by stones thrown by his own people. On the night of June 30 to July 1, the Noche Triste, Spanish forces and their Tlaxcalan allies attempted to flee the city across the western causeway. Mexica warriors in canoes attacked along the causeway. Between 600 and 800 Spanish soldiers died, along with thousands of Tlaxcalan allies. All horses, cannons, and plunder were lost.
Cortés regrouped in Tlaxcala and spent eight months building a coalition and constructing 13 brigantines, armed sailing vessels that could operate on Lake Texcoco. Smallpox arrived in Tenochtitlan during this period, probably introduced by an infected African slave in Narváez's force. The epidemic killed thousands, including Cuitláhuac, who succeeded Moctezuma and ruled for only 80 days before dying of the disease in early December 1520. Cuauhtémoc, the last Mexica emperor, assumed power at age 25 and organized the city's defense.
The siege of Tenochtitlan began in May 1521. Cortés commanded approximately 900 Spanish soldiers and between 100,000 and 200,000 indigenous allies, primarily Tlaxcalan but including warriors from dozens of city-states throughout the valley. The brigantines controlled the lake, cutting off supplies and reinforcements. Spanish and allied forces advanced along the causeways, destroying aqueducts and bridges, filling canals, and demolishing buildings to deny defenders cover. Combat occurred house by house, block by block. Starvation and disease weakened the defenders. On August 13, 1521, after 75 days of siege, Spanish and Tlaxcalan forces captured Cuauhtémoc attempting to escape by canoe. Organized resistance ended. Between 100,000 and 240,000 people died during the siege from combat, disease, and starvation. Tenochtitlan lay in ruins.