Thomas Jefferson's original rough draft of the Declaration of Independence, written in June 1776, including all the changes made later by John Adams, Benjamin Franklin and other members of the committee, and by Congress.

When he penned the Declaration of Independence in 1776, Thomas Jefferson had an inkling of the consequences it held for the 13 colonies, who were announcing their intention to break free from the shackles of British rule. What he and the other signers may not have anticipated, however, were the widespread effects the powerful words would also have around the world. The promise was evident in the famous phrases scrawled near the top of the document:

"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."

The Declaration of Independence didn't just change the course of American history, but created a ripple effect that nudged a host of other nations toward independence, making a revolutionary poster boy of Jefferson in the process.

The Enlightenment

Britain's vast army was already on its way towards New York Harbor when Jefferson sat down to compose the Declaration in June of 1776, beginning:

"When in the course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation."

This depiction of the Declaration of Independence is a painting by John Trumbull. It shows the five-man drafting committee presenting their work to the Congress. The painting hangs in the U.S. Capitol rotunda. (Image credit: John Trumbull painting. Image in public domain)

The ideas Jefferson expressed, which justified the reasons for revolt with a list of charges against the British king, weren't original. A number of global texts written during the highly charged Enlightenment years of the 17th and 18th centuries included similar ideals about liberty and the right to self-determination, and Americans throughout the colonies were already promoting the progressive worldview in newspapers and schoolbooks.

It was the fiery political climate into which the Declaration was born that made Jefferson's words so important. When his final draft was edited and adopted by Congress on July 4th, the statement signified independence, but it also solidified the path to all-out war, and not just in the new United States.

Liberty gets going

Immediately after it was printed, the Declaration sparked worldwide debate on the legitimacy of colonial rule.

Several countries used the document as a shining beacon in their own struggles for independence and adopted Jefferson as their figurehead. Jefferson himself predicted that American independence would be a catalyzing force — a "ball of liberty," he called it — that would soon make its way across the globe.

First came France, whose revolution in the 1780s and 90s drew upon the American experience and literature for inspiration. Jefferson happened to be a minister to France at the time and became an ardent supporter of the revolutionaries, even helping to draft a charter of rights in support of a new republic, eerily similar to the one he'd written just over a decade prior.

With its mother country France in disarray, another colony inspired by the American Revolution sought independence in the late 18th century. Haiti had been a profitable sugar and coffee colony for centuries, known as one of the cruelest plantation islands in the Caribbean. Led by freed slave Toussaint L'Ouverture, who quoted both France and America's declarations to stir the uprising, Haiti achieved its own liberty in 1804. Ironically, former slaves in Haiti had used the Declaration of Independence as a model in their fight for freedom while the document gave no such rights to slaves in the United States.

In the years that followed, themes from the Declaration were sourced and reinterpreted for further independence movements in Greece, Poland, Russia and throughout South America. A world of empires was gradually turning into a world of sovereign states. — Heather Whipps

Full Text of the Declaration of Independence

What follows, the original transcript of the Declaration of Independence, was provided by the U.S. government via archive.gov:

IN CONGRESS, July 4, 1776.

The unanimous Declaration of the thirteen united States of America,

When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.

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.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness. Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.--Such has been the patient sufferance of these Colonies; and such is now the necessity which constrains them to alter their former Systems of Government. The history of the present King of Great Britain is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these States. To prove this, let Facts be submitted to a candid world.

He has refused his Assent to Laws, the most wholesome and necessary for the public good. He has forbidden his Governors to pass Laws of immediate and pressing importance, unless suspended in their operation till his Assent should be obtained; and when so suspended, he has utterly neglected to attend to them. He has refused to pass other Laws for the accommodation of large districts of people, unless those people would relinquish the right of Representation in the Legislature, a right inestimable to them and formidable to tyrants only. He has called together legislative bodies at places unusual, uncomfortable, and distant from the depository of their public Records, for the sole purpose of fatiguing them into compliance with his measures. He has dissolved Representative Houses repeatedly, for opposing with manly firmness his invasions on the rights of the people. He has refused for a long time, after such dissolutions, to cause others to be elected; whereby the Legislative powers, incapable of Annihilation, have returned to the People at large for their exercise; the State remaining in the mean time exposed to all the dangers of invasion from without, and convulsions within. He has endeavoured to prevent the population of these States; for that purpose obstructing the Laws for Naturalization of Foreigners; refusing to pass others to encourage their migrations hither, and raising the conditions of new Appropriations of Lands. He has obstructed the Administration of Justice, by refusing his Assent to Laws for establishing Judiciary powers. He has made Judges dependent on his Will alone, for the tenure of their offices, and the amount and payment of their salaries. He has erected a multitude of New Offices, and sent hither swarms of Officers to harrass our people, and eat out their substance. He has kept among us, in times of peace, Standing Armies without the Consent of our legislatures. He has affected to render the Military independent of and superior to the Civil power. He has combined with others to subject us to a jurisdiction foreign to our constitution, and unacknowledged by our laws; giving his Assent to their Acts of pretended Legislation: For Quartering large bodies of armed troops among us: For protecting them, by a mock Trial, from punishment for any Murders which they should commit on the Inhabitants of these States: For cutting off our Trade with all parts of the world: For imposing Taxes on us without our Consent: For depriving us in many cases, of the benefits of Trial by Jury: For transporting us beyond Seas to be tried for pretended offences For abolishing the free System of English Laws in a neighbouring Province, establishing therein an Arbitrary government, and enlarging its Boundaries so as to render it at once an example and fit instrument for introducing the same absolute rule into these Colonies: For taking away our Charters, abolishing our most valuable Laws, and altering fundamentally the Forms of our Governments: For suspending our own Legislatures, and declaring themselves invested with power to legislate for us in all cases whatsoever. He has abdicated Government here, by declaring us out of his Protection and waging War against us. He has plundered our seas, ravaged our Coasts, burnt our towns, and destroyed the lives of our people. He is at this time transporting large Armies of foreign Mercenaries to compleat the works of death, desolation and tyranny, already begun with circumstances of Cruelty & perfidy scarcely paralleled in the most barbarous ages, and totally unworthy the Head of a civilized nation. He has constrained our fellow Citizens taken Captive on the high Seas to bear Arms against their Country, to become the executioners of their friends and Brethren, or to fall themselves by their Hands. He has excited domestic insurrections amongst us, and has endeavoured to bring on the inhabitants of our frontiers, the merciless Indian Savages, whose known rule of warfare, is an undistinguished destruction of all ages, sexes and conditions.

In every stage of these Oppressions We have Petitioned for Redress in the most humble terms: Our repeated Petitions have been answered only by repeated injury. A Prince whose character is thus marked by every act which may define a Tyrant, is unfit to be the ruler of a free people.

Nor have We been wanting in attentions to our Brittish brethren. We have warned them from time to time of attempts by their legislature to extend an unwarrantable jurisdiction over us. We have reminded them of the circumstances of our emigration and settlement here. We have appealed to their native justice and magnanimity, and we have conjured them by the ties of our common kindred to disavow these usurpations, which, would inevitably interrupt our connections and correspondence. They too have been deaf to the voice of justice and of consanguinity. We must, therefore, acquiesce in the necessity, which denounces our Separation, and hold them, as we hold the rest of mankind, Enemies in War, in Peace Friends.

We, therefore, the Representatives of the united States of America, in General Congress, Assembled, appealing to the Supreme Judge of the world for the rectitude of our intentions, do, in the Name, and by Authority of the good People of these Colonies, solemnly publish and declare, That these United Colonies are, and of Right ought to be Free and Independent States; that they are Absolved from all Allegiance to the British Crown, and that all political connection between them and the State of Great Britain, is and ought to be totally dissolved; and that as Free and Independent States, they have full Power to levy War, conclude Peace, contract Alliances, establish Commerce, and to do all other Acts and Things which Independent States may of right do. And for the support of this Declaration, with a firm reliance on the protection of divine Providence, we mutually pledge to each other our Lives, our Fortunes and our sacred Honor.

Who Signed the Declaration of Independence?

Here are the 56 signers of the document:

Column 1 Georgia: Button Gwinnett Lyman Hall George Walton

Column 2 North Carolina: William Hooper Joseph Hewes John Penn South Carolina: Edward Rutledge Thomas Heyward, Jr. Thomas Lynch, Jr. Arthur Middleton

Column 3 Massachusetts: John Hancock Maryland: Samuel Chase William Paca Thomas Stone Charles Carroll of Carrollton Virginia: George Wythe Richard Henry Lee Thomas Jefferson Benjamin Harrison Thomas Nelson, Jr. Francis Lightfoot Lee Carter Braxton

Column 4 Pennsylvania: Robert Morris Benjamin Rush Benjamin Franklin John Morton George Clymer James Smith George Taylor James Wilson George Ross Delaware: Caesar Rodney George Read Thomas McKean

Column 5 New York: William Floyd Philip Livingston Francis Lewis Lewis Morris New Jersey: Richard Stockton John Witherspoon Francis Hopkinson John Hart Abraham Clark

Column 6 New Hampshire: Josiah Bartlett William Whipple Massachusetts: Samuel Adams John Adams Robert Treat Paine Elbridge Gerry Rhode Island: Stephen Hopkins William Ellery Connecticut: Roger Sherman Samuel Huntington William Williams Oliver Wolcott New Hampshire: Matthew Thornton

This article, adapted and updated, was originally part of a LiveScience series about People and Inventions that Changed the World.