By issuing the Declaration Of Independence, adopted by the Continental Congress on July 4, 1776, the 13 American colonies severed their political connections to Great Britain. The Declaration summarized the colonists' motivations for seeking Independence.
Do you have a list of the terms? :)
There is a balance of power that shifts based on what the American people want, and based on our ever changing needs. This encourages change. It can have the problem of becoming gridlocked though, where congressional representatives from both parties will refuse to work together based on disagreements.