According to John O'Sullivan, what characteristics separated the United States from other nations?

In "The Great Nation of Futurity,"  an essay he penned in
1839,John O'Sullivan, the man credited with coining the term "manifest destiny,  argued
that the United States was "disconnected" and very different from other nations, being
based as it was (is) on equality for everyone.  O'Sullivan refers to the premise of
equality, as well as the newness of the United States and its lack of a history of
grievances, cruelties, injustices, dictators and monarchs, as being the things that made
it different.  O'Sullivan also believed that the United States was sanctioned by none
other than God himself to spread the ideals of democracy from the Atlantic all the way
trans-continent to the Pacific Ocean.  As is common given the context of the times, O'
Sullivan seemed unaware of the irony of a nation based on equality that was functioning
in its Southern portion with a firmly entrenched slavery system.  In fact, during the
Civil War, there is some evidence that O'Sullivan supported, and maybe even worked for
the Confederacy, also an interesting possiblity given his position that the United
States was a bastion of equality.