Cicero and seneca introduction ideas of a successful government, including popular sovereignty which means

Popular sovereignty is the concept that is best stated by the declaration of independence. That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed (Declaration of Independence preamble) in other words that governments are meant to protect its citizens. 

This act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.