What made America great was a Constitution, that while flawed, had the concept of limited government at it's core. Sadly, our Constitution has been under attack for the last three-quarters of a century and we no longer have a federal government limited to the powers itemized in Article I, Section 8 of our Constitution. Slevery was a gross violation of the spirit of the Declaration of Independence which declared that all men had inalienable rights. These inalienable rights were derived from natural law. We have veered far from the natural law basis of our Constitution. I am a slave from Jan till May every year. You have no right to claim anothers labor for your own. This does not matter if you are a slaveowner or a welfare bum. I got more respect for the slaveowners. Washington and Jefferson come to mind as great individuals with the flaw, common to their times, of prejudice. I can think of no welfare bums who contribute to society.
Sadly, the anti-federalists turned out to be right. The Constitution has been bastardized, by judicial decree, into a constitution that allows a tyrannical federal government far from the vision of it's authors. Ron Paul in 2008, for a return to constitutional government.