What evidence from the Declaration of Independence helps you know why it was written?

The Declaration of Independence explicitly states its purpose in the opening lines, asserting that it was written to explain the colonies' decision to separate from British rule. It highlights grievances against King George III, such as the violation of natural rights and the imposition of unjust laws, which fueled the desire for independence. Additionally, the assertion that "all men are created equal" emphasizes the colonies' commitment to individual rights and self-governance, reinforcing the rationale behind the declaration. Overall, it serves as both a formal announcement of independence and a justification for seeking autonomy from oppressive governance.