After 1763, Parliament imposed new taxes on the colonies. The colonists used English principles against London: no taxation without representation. On 4 July 1776, the Declaration of Independence stated that all men are created equal and that governments derive their just powers from the consent of the governed. The same text, in its list of grievances against the king, calls Native peoples “the merciless Indian Savages”. Slavery remained legal in all the colonies.
Read the source: National Archives, Declaration of Independence