Why is immigration such a contentious issue in US history?

What religion influenced the first persian empire as established by cuyrus the great?

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another? focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery? question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.

The incas used quipus to options -preserve there history -keep records of people and goods -decide when to plant crops -decide work amoung peasant familys