Why do the colonies have the right to overthrow the British government?

To protect the rights of the common folk.

Explanation:

There were many reasons that led to the signing of the Declaration of Independence, but most of it was because the founding fathers believed all humans should have certain inherited rights, like the pursuit of happiness. Being under a tyranny, they did not have those rights.

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases