Roosevelt's New Deal Recovery programs focused on stabilizing the economy by creating long-term employment opportunities, decreasing agricultural supply to drive prices up, and helping homeowners pay mortgages and stay in their homes, which also kept the banks solvent.
They were more focused on living life for themselves and not the afterlife. In the Middle Ages, they were focused on social classes.
The pax romana made peace for about 200 yrs
Gallatin believed that Manifest Destiny was nothing more than greed to control the continent. It was a false name and idea for the true purpose. O'Sullivan saw Manifest Destiny as many in the US did: Progress and the Fate of the US. We were "destined" to control everything and that one should move out of the way of progress or be run over by it.