INDUS VALLEY
When 19th century explorers and 20th century archaeologists
rediscovered the ancient Indus Valley civilization, the history of the
Indian sub-continent had to be rewritten.* Many questions remain
unanswered.
The Indus Valley civilization is an ancient one, on the same order as
Mesopotamia, Egypt, or China. All these areas relied on important
rivers: Egypt relying on the annually flooding Nile, China on the
Yellow River, the ancient Indus Valley civilization (aka Harappan,
Indus-Sarasvati, or Sarasvati) on the Sarasvati and Indus rivers, and
Mesopotamia outlined by the Tigris and Euphrates rivers.
Like the people of Mesopotamia, Egypt, and China, the people of the
Indus civilization were culturally rich and share a claim to the
earliest writing. However, there is a problem with the Indus Valley that
doesn't exist in such pronounced form elsewhere.
Evidence is missing elsewhere, through the accidental depredations of
time and catastrophes or deliberate suppression by human authorities,
but to my knowledge, the Indus Valley is unique among major ancient
civilizations in having a major river disappear. In place of the
Sarasvati is the much smaller Ghaggar stream that ends in the Thar
desert. The great Sarasvati once flowed into the Arabian Sea, until it
dried up in about 1900 B.C. when the Yamuna changed course and instead
flowed into the Ganges. This may correspond with the late period of the
Indus Valley civilizations.
- Mohenjo-Daro - From Archaeology at About.com
The mid-second millennium is when the Aryans
(Indo-Iranians) may have invaded and possibly conquered the
Harappans, according to a very controversial theory. Before then, the
great Bronze Age Indus Valley civilization flourished in an area greater
than one million square km. It covered "parts of Punjab, Haryana,
Sindh, Baluchistan, Gujarat and fringes of Uttar Pradesh"+. On the basis
of artifacts of trade, it appears to have flourished at the same time
as the Akkadian civilization in Mesopotamia.
Indus Housing
If you look at an Harappan housing plan, you'll see straight lines (a
sign of deliberate planning), orientation to the cardinal points, and a
sewer system. It held the first great urban settlements on the Indian
subcontinent, most notably at the citadel cities of Mohenjo Daro and
Harappa.
Indus Economy and Subsistence
The people of the Indus Valley farmed, herded, hunted, gathered, and
fished. They raised cotton and cattle (and to a lesser extent, water
buffalo, sheep, goats, and pigs), barley, wheat, chickpeas, mustard,
sesame, and other plants. They had gold, copper, silver, chert,
steatite, lapiz lazuli, chalcedony, shells, and timber for trading.
Writing
The Indus Valley civilization was literate -- we know this from seals
inscribed with a script that is now only in the process of being
deciphered. [An aside: When it is finally deciphered, it should be a big deal, as was Sir Arthur Evans' deciphering of Linear B. Linear A still needs deciphering, like the ancient Indus Valley script.] The first literature of the Indian subcontinent came after the Harappan period and is known as Vedic. It doesn't appear to mention the Harappan civilization.
The Indus Valley civilization flourished in the third millennium B.C.
and suddenly disappeared, after a millennium, in about 1500 B.C. --
possibly as a result of tectonic/volcanic activity leading to the
formation of a city-swallowing lake.

