Why do the authors or the Declaration (Jefferson et al) feel that the colonies are OBLIGATED to become a free and independent country?

Jefferson ended his draft by stating, "we do assert and declare these colonies to be free and independent states. Instead, they concentrated on Jefferson's list of grievances against King George and the British people. The delegates made some small changes to improve the Declaration's clarity and accuracy. One purpose of the Declaration of Independence was to explain their view of the purpose of human government. If you read the text of the Declaration, you will see that the signers believed that all men were created equal by God and that they possess certain unalienable rights

Explanation:

Neither Parliament nor King George, however, were interested in negotiations to prevent all-out war. In August 1775, King George issued a proclamation charging that the Americans "had proceeded to open and avowed rebellion." A few months later, Parliament passed a significant act that placed the American colonies outside the king's protection. This act allowed the seizing of American ships, justified the burning of colonial towns, and led to sending war ships and troops, including foreign mercenaries, to put down the rebellion. Meanwhile, the royal governor of Virginia offered freedom to slaves who joined the British cause. These actions by the British king and government inflamed Americans who were undecided about independence and made war with England all but certain.

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