There is not only no free state which would now establish it, but there is no slave state, which, if it had had the free alternative as we now have, would have founded slavery.
Bio: Vasil Levski, born Vasil Ivanov Kunchev, was a Bulgarian revolutionary and is a national hero of Bulgaria. Dubbed the Apostle of Freedom, Levski ideologised and strategised a revolutionary movement to liberate Bulgaria from Ottoman rule.