https://www.washingtonpost.com/news/volokh-conspiracy/wp/2017/07/04/what-the-declaration-of-independence-said-and-meant/?noredirect=on&utm_term=.b302ed9232a7
But to justify a revolution, it was not thought to be enough that officials of the government of England, the Parliament, or even the sovereign himself had violated the rights of the people. No government is perfect; all governments violate rights. This was well known. So the Americans had to allege more than mere violations of rights. They had to allege nothing short of a criminal conspiracy to violate their rights systematically. Hence, the famous reference to “a long train of abuses and usurpations” and the list that follows the first two paragraphs. In some cases, these specific complaints account for provisions eventually included in the Constitution and Bill of Rights.
In Our Republican Constitution: Securing the Liberty and Sovereignty of We the People, I explain how the Declaration encapsulated the political theory that lead the Constitution some eleven years later. To appreciate all that is packed into the two paragraphs that comprise the preamble to the list of grievances, it is useful to break down the Declaration into some of its key claims.
“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 first sentence is often forgotten. It asserts that Americans as a whole (and not as members of their respective colonies) are a distinct “people.” To “dissolve the political bands” revokes the “social compact” that existed between the Americans and the rest of “the People” of the British commonwealth, reinstates the “state of nature” between Americans and the government of Great Britain, and makes “the Laws of Nature” the standard by which this dissolution and whatever government is to follow are judged. “Declare the causes” indicates they are publicly stating the reasons and justifying their actions rather than acting as thieves in the night. The Declaration is like the indictment of a criminal that states the basis of his criminality. But the ultimate judge of the rightness of their cause will be God, which is why the revolutionaries spoke of an “appeal to heaven”—an expression commonly found on revolutionary banners and flags. As British political theorist John Locke wrote: “The people have no other remedy in this, as in all other cases where they have no judge on earth, but to appeal to heaven.” The reference to a “decent respect to the opinions of mankind” might be viewed as a kind of an international public opinion test. Or perhaps the emphasis is on the word “respect,” recognizing the obligation to provide the rest of the world with an explanation they can evaluate for themselves.
“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 most famous line of the Declaration. On the one hand, this will become a great embarrassment to a people who permitted slavery. On the other hand, making public claims like this has consequences—that’s why people make them publicly. To be held to account. This promise will provide the heart of the abolitionist case in the nineteenth century, which is why late defenders of slavery eventually came to reject the Declaration. And it forms the basis for Martin Luther King’s metaphor of the civil rights movement as a promissory note that a later generation has come to collect.