Shara Mae Butlig
Last Updated: March 24, 2025
What secrets do the ruins of Mohenjo-Daro and Harappa still hold?
The Harappans were the architects of one of the world's earliest urban civilisations, flourishing in the Indus Valley from approximately 3300 BCE to 1300 BCE. This civilisation, also known as the Indus Valley Civilisation (IVC), is named after Harappa, one of its major cities. It spanned a vast area, covering present-day Pakistan, northwest India, and parts of Afghanistan.
Unlike the contemporary Mesopotamian and Egyptian civilisations, the Harappans remain enigmatic due to the lack of deciphered written records. What we do know, however, comes from their advanced urban planning, sophisticated trade networks, and material culture unearthed at major archaeological sites such as Mohenjo-Daro, Harappa, Dholavira, and Rakhigarhi.
The Harappan civilisation was extensive, with an estimated population of five million at its peak. Some of its cities, including Mohenjo-Daro and Harappa, are believed to have housed 30,000 to 60,000 inhabitants, making them some of the largest settlements of the ancient world. The overall population was scattered across hundreds of settlements, ranging from small villages to large urban centers.
The sheer scale of population distribution suggests a highly organized society with a strong agricultural base. The fertile plains of the Indus and Ghaggar-Hakra rivers provided ideal conditions for farming, which likely sustained such a significant population.
One of the greatest mysteries of the Harappan civilisation is its language. The Harappans left behind thousands of inscriptions on seals, pottery, and tablets, but their script remains undeciphered. This script, commonly referred to as the Indus script, consists of symbols that scholars believe could represent a logo-syllabic or proto-writing system.
Many researchers speculate that the Harappan language might be related to the Dravidian language family, which is spoken in parts of southern India today. However, without a bilingual text like the Rosetta Stone, the true nature of the Indus script remains speculative.
The Harappans were pioneers of urban planning, sanitation, and metallurgy. Their technological prowess is evident in multiple aspects of their society:
The Indus Valley cities were meticulously planned with grid-like street layouts, multi-storied brick houses, and drainage systems. Cities like Mohenjo-Daro featured the Great Bath, possibly used for religious or ceremonial purposes, and a sophisticated underground sewage system that was centuries ahead of its time.
The Harappans practiced advanced agriculture, cultivating wheat, barley, peas, sesame, and cotton—the latter being the earliest known instance of cotton use in human history. They employed irrigation systems to manage water supply efficiently, which was crucial given the seasonal nature of the rivers.
Harappan artisans excelled in metallurgy, producing copper, bronze, lead, and tin objects. They also crafted exquisite jewelry, beads, and pottery. The famous "Dancing Girl" bronze statue from Mohenjo-Daro showcases their expertise in lost-wax casting techniques.
The civilisation was engaged in long-distance trade with Mesopotamia, Oman, and Central Asia. Harappan seals, marked with the yet-to-be-deciphered script, have been found in Mesopotamian sites, suggesting a thriving trade network involving commodities like textiles, semi-precious stones, and metals.
The origins of the Harappan civilisation remain a subject of scholarly debate. Some theories suggest that it evolved from the earlier Mehrgarh culture (circa 7000 BCE), a Neolithic settlement in present-day Pakistan. Mehrgarh exhibits early signs of agriculture, pottery, and domesticated animals, which may have influenced later Harappan developments.
Other theories propose that the Harappans were an indigenous people who gradually developed their civilisation due to advancements in agriculture and trade. Genetic studies have hinted at connections between the Harappans and modern South Asian populations, particularly Dravidian-speaking groups. However, conclusive evidence is still lacking.
The Harappan civilization is generally divided into three phases:
During this formative phase, small farming communities expanded into larger settlements. Distinct pottery styles, early trade networks, and rudimentary town planning emerged.
This was the golden age of the Indus Valley Civilization, marked by well-planned cities, advanced technology, and extensive trade. This period saw the peak of Harappan culture, with standardized weights and measures, artistic advancements, and the spread of their urban centers.
Around 1900 BCE, signs of decline began to appear. Urban centers were gradually abandoned, and trade networks collapsed. By 1300 BCE, most Harappan cities had disappeared, replaced by smaller, scattered settlements.
The reasons for the decline of the Harappan civilization remain speculative. Several theories have been proposed:
One widely accepted theory suggests that climate change played a role in the civilisation’s decline. Shifts in monsoon patterns and the drying up of the Ghaggar-Hakra River may have led to agricultural failures, forcing people to migrate.
Seismic activity might have altered the course of the Indus River, disrupting the civilisation’s water supply and trade routes, leading to urban decay.
Early scholars, including Mortimer Wheeler, proposed that Aryan invasions led to the civilization’s downfall. However, modern archaeology has found little evidence of violent conquest, making this theory less likely.
Some researchers believe that internal social unrest, economic decline, or resource depletion led to the gradual abandonment of Harappan cities.
The Harappan Civilisation remains one of the most intriguing chapters in human history, a testament to early ingenuity, resilience, and cultural sophistication. From their meticulously planned cities to their mastery of trade and craftsmanship, the Harappans set standards that would influence future civilizations. Yet, despite their undeniable achievements, their language remains undeciphered, and the exact reasons behind their decline continue to puzzle scholars. Each new archaeological discovery brings us closer to understanding their world, but many questions remain unanswered.
While the Harappan cities may have faded, their legacy endures in the traditions, architecture, and agricultural practices of South Asia. The study of this lost civilization is not just about uncovering the past—it is about piecing together humanity’s shared history and learning from its successes and struggles. As researchers continue to explore new sites and decode ancient scripts, the Harappan story is far from over. Perhaps, in time, we will finally hear the voices of the people who once thrived along the banks of the Indus.
Scholars have proposed multiple theories about the Harappan civilization, ranging from its origins and governance to the reasons behind its decline. One prevailing hypothesis is that the Harappans were part of an indigenous cultural continuum that evolved from the earlier Mehrgarh settlements, gradually developing advanced urban planning and trade networks (Kenoyer, 1998). Another theory suggests that the Harappans may have spoken a proto-Dravidian language, linking them to modern South Indian linguistic groups, though the undeciphered Indus script leaves this unconfirmed. Some researchers also speculate that the civilization functioned without a centralized monarchy, relying instead on a decentralized governance model, as indicated by the lack of grand palaces or royal tombs.
The decline of the Harappan civilization remains one of its greatest mysteries, with competing hypotheses pointing to environmental changes, tectonic activity, and economic disruptions. Wright (2010) suggests that shifting monsoon patterns and the drying of the Ghaggar-Hakra River may have forced mass migrations, leading to urban collapse. Others propose that a gradual societal breakdown, rather than a single catastrophic event, caused the civilization’s decline. While some early theories speculated about invasions, modern archaeology has found little evidence to support this. As ongoing excavations and genetic studies continue to refine our understanding, the true fate of the Harappans may one day be revealed.
This podcast explores the lost ancient Indus Civilization, one of the world's earliest urban cultures, thriving in present-day India and Pakistan over 5,000 years ago. With advanced city planning, sanitation systems, and trade networks, the Indus people left behind mysterious artifacts and undeciphered scripts. Graham Hancock and experts discuss the civilization’s rise, decline, and possible connections to other ancient societies. Could there be more hidden secrets waiting to be uncovered?
Journalist James Nestor joins The Joe Rogan Experience to discuss the ancient civilization that pioneered yogic breathing techniques. He explores how early practitioners developed advanced breathwork methods to enhance physical and mental health, influencing modern yoga and meditation. Nestor highlights scientific findings on the power of controlled breathing, its impact on longevity, and how ancient wisdom aligns with cutting-edge research. The conversation delves into how these techniques can improve focus, resilience, and overall well-being.
Joe Rogan and Billy Carson discuss the controversial theory of a catastrophic event at Mohenjo-Daro, an ancient Indus Valley city. Some researchers suggest evidence of extreme heat and scattered skeletal remains could indicate a nuclear-like explosion thousands of years ago. While mainstream archaeology attributes the city's decline to natural causes, alternative theories propose advanced ancient technology or extraterrestrial influence. The discussion explores historical anomalies, ancient texts, and whether humanity's past is more advanced than widely believed.
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The Harappan Civilization and Its Writing: A Model for the Decipherment of the Indus Script, Fairservis, 2023.
Prehistory and Harappan Civilization, Raj Kumar Pruthi, Raj Pruthi, 2004.
Understanding Harappa: Civilization in the Greater Indus Valley, Shereen Ratnagar, 200.
The Indus Civilization: A Contemporary Perspective, By Gregory L. Possehl, 2002.
The Indus: Lost Civilizations, Andrew Robinson, 2021.
Indus Valley Civilization: A History from Beginning to End, Hourly History, 2019.
Harappa.Com - is a comprehensive online resource dedicated to the Indus Valley Civilization, one of the world's earliest urban cultures. The site offers extensive research, articles, images, and insights into the ancient cities of Harappa and Mohenjo-Daro, covering topics like archaeology, history, language, and daily life. It serves as an educational platform for scholars, students, and history enthusiasts interested in exploring South Asia’s prehistoric past.