the declaration of independence is considered the first formal assertion by a people of their right…

Brief Explanations:

The Declaration of Independence declared that the 13 American colonies regarded themselves as independent states, free from British rule, asserting the right of self - government. It was a statement of the people's right to govern themselves, not specifically about the right to revolution (though revolution followed), liberty in a more general sense than just self - government, and the right to vote was not its main focus as voting rights were limited at the time of its creation.

Answer:

self - government.