"[I could not] think of punishing him [Billey (his slave)] by transportation merely for coveting liberty for which we have paid the price of so much blood, and have proclaimed so often to be the right, and worthy pursuit, of every human being." James Madison to his father.
According to this letter, Madison, and by extension, the Founders, admits that the phrase "all men are created equal" and therefore deserves the unalienable rights in the Declaration of Independence This line in a letter destroys the narrative that the Founders weren't including black Americans in the Declaration of Independence.