Yet, there are many problems with this. Aside from the critical fact that half of the states, prior to the Civil War, didn’t have slavery, and free labor radically outproduced slave labor (thus, leading to the conclusion that America and capitalism were really built on free labor, not on slave labor), perhaps the biggest problem resides in our very Founding and the documents that define it. In particular, it is worth considering the Declaration of Independence, passed on July 4, 1776, and signed on August 2, 1776. In it, Jefferson first defines the nature of the universe and man’s role within it. That is, “when in the course of human events….” In the following paragraph, though, Jefferson made a statement that astounded the world. But, to Jefferson and Congress, they were merely stating the obvious: “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.” To be sure, this has to be one of the most powerful sentences in the history of the world, especially in its non-religious history. Critically, the statement claims that “all men”—not some men, not non-Catholics (see, for example, the 1689 English Bill of Rights), or not non-whites—are created equal. The founders could have easily tempered this statement, but they didn’t. Indeed, it exists in a world of glory, and it became, as Martin Luther King, Jr., so profoundly understood it, a promissory note. Just because Americans did not live up fully to the statement in 1776 did not mean that they never would.
— Read on theimaginativeconservative.org/2022/07/americas-anti-slavery-legacy-bradley-birzer.html