On August 10, 1776, news reaches London that the Americans had drafted the Declaration of Independence.

Until the Declaration of Independence formally transformed the 13 British colonies into states, both Americans and the British saw the conflict centered in Massachusetts as a local uprising within the British empire. To King George III, it was a colonial rebellion, and to the Americans, it was a struggle for their rights as British citizens. However, when Parliament continued to oppose any reform and remained unwilling to negotiate with the American rebels and instead hired Hessians, German mercenaries, to help the British army crush the rebellion, the Continental Congress began to pass measures abolishing British authority in the colonies.

In January 1776, Thomas Paine published Common Sense, an influential political pamphlet that convincingly argued for American independence from the British monarchy. It sold more than 500,000 copies in just a few months. By the spring of 1776, support for independence had swept through the colonies, the Continental Congress called for states to form their own governments and a five-man committee was assigned to draft a document declaring independence from the British king.

The Declaration of Independence was largely the work of Virginian Thomas Jefferson. In justifying American independence, Jefferson drew generously from the political philosophy of John Locke, an advocate of natural rights, and from the work of other British theorists. The declaration features the immortal lines “We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.” It then goes on to present a long list of grievances that provided the American rationale for rebellion.