Backstory Would Be Interesting How Thomas Jefferson Convinced Old South Signers of Declaration Created Equal

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The signers of the Declaration of Independence included many from the southern states, that document which posits that all men are created equal, so you wonder why Jefferson, a slaveholder, convinced those other slaveholders to sign, perhaps all having realized that slavery should be abolished and eventually would be indeed, the transition impracticable at that time they seem to have signaled.