What made the declaration of independence such a radical document?

For the first real time in world history, subjects of a King were saying that they no longer were going to be ruled and were willing to say that in a calm and legally infused manner.

Further Explanation:

While subjects have long quarreled with their Kings, to varying degrees of success, the Declaration of Independence is a ground-breaking document in that it is the first time in world history that a colony announced its intention to break off from its host country and to do so with a document that clearly and succinctly defines, using terms of the Enlightenment, why they were doing so. It would become an influential document and used in revolutions for centuries to come.

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Keywords

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

“the iliad” (gr: “iliás”) is an epic poem by the ancient greek poet homer, which recounts some of the significant events of the final weeks of the trojan war and the greek siege of the city of troy (which was also known as ilion, ilios or ilium in ancient times).