Independent states unified under a weak central government have what is called a "confederate government," much like the government the Southern states were trying to implement during the Civil War.
A likely explanation would be that there was not enough food available for the entire growing civilization at the time, and that the people of the civilzation moved around and were eventually dissolved into different cultures,
While others civilizations were devoting huge amounts of time and resources to the rich, ... The ruins of two ancient cities, Harappa and Mohenjo-Daro (both in ... Similar seals with different animal symbols and writings have since been found throughout the region. ... This copy of the Rig Veda was written after the Vedic Age.
Russia dropped out of WW1 early and thus was not present at the Versailles Peace talks.
