Stoicism. Their ethic, while a little strange is nowhere near as offensive as the Epicureans. It even has some noticeable virtue in it. Yes, the monism is also odd, but frankly from a theist view, pantheism is closer than atomism. Also, in modern America while Epicureanism is very much still alive and just as screwed up. If anything we could use a little more stoic mentality creeping into the cesspool of emotional whinging that is our current political discourse.
Indeed, Stoicism doesn't fit to Your country: Stoicism:Epicureanism=NeoPlatonism:Aristotelism=Realism:Nominalism=SU:US