Thanks for the link. It oh so clearly shows calhoun to be the same sort of garden variety hair-splitting leftist democrat we’re all too used to suffering through in the Øbongo administration.
His essential point was that liberty is earned through education and actions, and that the state must protect liberty of the people above all else.
Governments should not engage in legislative action based on illogical concepts of egalitarian crusading, and that was what was happening in 1848 in the US Congress.
I personally think that this speech was probably his most important work. Many have concluded that his commentary is in direct opposition to Jefferson's DOI phrase that "all men are created equal". Jefferson used that phrase to refute the "divine right of kings" argument against Independence.
I do not think it was connected with egalitarian thought on the continent.