How did the aryans interact with the indus valley

Which is one important element of romantic literature

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?

Why are governments formed? what role does government play in society? what would life be like without government? what purpose of government would have the most dramatic effect on society if it were taken away? which purpose of government has the greatest effect on your daily life?