It was the Founding Father Thomas Jefferson who included the idea of natural rights when he wrote the Declaration of Independence, since he wanted to make it clear why exactly the colonies were breaking ties with Britain.
The King decided if they deserved representation in Parliament
It was a step towards racial equality and a major point in the Civil Rights Movement. Although it took the Voting Rights Act to finally enforce it, African Americans were supposed to be citizens with the right to vote since the passage of the 14th and 15th Amendments to the Constitution.