Why did the sighners of the declaration of independents to justify there actions?

The signers of the Declaration of Independence justified their actions by asserting that they were exercising their natural rights to life, liberty, and the pursuit of happiness, as outlined in Enlightenment philosophy. They argued that the British government had violated these rights through oppressive laws and taxation without representation. By declaring independence, they aimed to establish a government based on the consent of the governed, emphasizing that it was their duty to overthrow tyranny and seek self-determination. This document served as both a formal break from Britain and a moral justification for their quest for autonomy.