Harappan civilization existed from 3300 BCE to around 1300 BCE and prospered between 2600-1900 BCE.
Harappan civilization covered an area of one million square kilometers, larger than Mesopotamia, Egypt, and China.
The Ghaggar-Hakra river may have been the ancient lost Saraswati river of Hindu literature.
Harappan civilization was one of the earliest urban civilizations in human history, completely absent in the historical record.
Harappans did not have a strict hierarchy of classes, state monopolized use of violence, power focused on individual leaders, or centralized state-controlled economies.
There was no evidence for kings, priests, or priest-kings for Harappans, and there were no royal tombs or palaces.
There was no evidence for a state religion, temples, pyramids, or ziggurats, and no signs of an army, weapons, slaves, or a powerful political capital.
All Harappan citizens lived relatively equal lives, and it seems that there were no natural enemies and they themselves seemed more interested in trade than conquest.
Harappan cities were planned and had a focus on water, drainage, and bathing.
Every Harappan home had a dedicated bathing room, used daily,built with watertight brick floors and sloped towardsasmall drain usually cut into the house wall.
Harappans had multi-storied buildings and used drains to bring water and waste from higher floors down to street level drains.
The Great Bath at Mohenjo-Daro was an impressive building with a 2.4m deep bathing pool in the center, and it was the only Harappan building with some sort of religious significance.
Main streets of Harappan cities were usually oriented north–south and east–west, which divided Harappan settlements into blocks.
Walls usually surrounded Harappan settlements, and there was usually a separately walled area built on a man-made mound known as a “citadel”.
Harappan cities were usually hundreds of km apart, and the Harappan state maintained almost complete uniformity over these massive distances.
Harappan writing remains undeciphered to this day, and all we have to work with is the short inscriptions they left behind on these tiny stone seals.
Harappans traded with the Arabian Gulf, Mesopotamia, Central Asia, and Iran.
Harappan sailors acted a lot like sailors of later times, since we’ve discovered ivory dice for games and gambling at sites they visited.
After 700 years of prosperity, the Harappan civilization went into a sudden decline around 1900 BCE.
Cities stopped following strict plans, drains were no longer maintained, and the art of writing was forgotten.
There is no evidence for massacres, battles, or sieges at any Harappan sites.
Factors such as a reduction in trade, climate change, disease, and civil strife all probably played a role in their collapse.
The Saraswati river played the biggest role in their collapse, as it began to dry up for reasons still being studied.