Self-government -- that is, a people exercising all the necessary functions of power without interference by a higher authority that they can't control themselves -- is a core American value. It's also at the heart of the Declaration of Independence, which we celebrate today.
Thomas Jefferson, the document’s primary author, wrote that self-rule is "the separate and equal station" that a people are entitled to under the laws of God and nature. It didn't come easily. America’s early history is marked by conflict with other countries threatened by republican government and among Americans themselves over the ultimate form that that government would take. But the Declaration laid the framework for a nation that would endure and grow, inspiring similar independence movements around the world.
When war first broke out between Britain and its North American colonists, few imagined, let alone supported, the creation of a new nation. Historians note that even as the fighting raged, the colonists were deeply divided over the future. Roughly a third came to believe a complete break with Britain was needed, a third remained loyal to the British crown and a third simply wanted to be left alone to raise their families and do their jobs.
The 56 men who signed the Declaration on July 4, 1776, cast the first votes for independence. Their fellow citizens ratified the choice, and with it the then-radical principle that government should be based on the consent of the governed.
While this is the event and cause we celebrate today, it isn't unique to Americans. It is embodied in the constitutions of many nations and observed in the Universal Declaration of Human Rights that we all recognize. In essence then, Independence Day is a celebration of our common humanity.