The US should and had been under great Presidents like Reagan promote freedom, capitalism and human rights and remain the shining city on the hill Reagan referenced.
That doesn't mean using our military to accomplish that but it does mean using our influence to promote all those things. That is truly one of the things that made us the greatest nation on earth and, oddly, it was something both the left and right agreed with.
The logical consequence of American universalism is what we have today. The Marine Corps and Army have become the tools of foreign policy in places we have no on going interests and the US southern border continues to be porous and only if DJT gets another term will we be kept from becoming North Mexico. Normal Americans who join the military to defend our country get to go to some sewer such as Iraq to engage in ‘nation building’ while the locals devote themselves to fanaticism and trying to kill as many Americans as possible while the political elites connive at letting hordes of illegals into help them subvert what America was supposed to be. A country where if you obeyed the law you were pretty much free to pursue your life , well sort of anyway. People such as the Bush family constantly intones this sanctimonious BS (read GWB’s Second Inaugural Address for a pitch perfect rendition of this poisonous nonsense).
Finally the rhetorical device of the ‘shining city on a hill’ trope meant exactly the opposite from what the Puritans such as John Winthrop meant by it. The Puritans saw themselves as the ‘elect’ who strove for ‘purity’. They came from England to get away from all the ‘impure’ people . They looked upon their towns as little shining centers of righteousness and wanted no part of the ‘impure’ rabble to pollute their holy presences. In other words the Puritans wanted nothing to do with anyone else. They proved to their own satisfaction that the Indians, who certainly were there first, were Satan's imps. I really wish American political tub thumpers would cease using that platitude. But it is great sucker bait, so they never will.