America was never meant to be an empire, for its objective from the very beginning was quite clear, which was to bring freedom, liberty, life, and the pursuit of happiness to all mankind, with the clear understanding that all humankind are created equally by God and thus are equally deserving of the same unalienable rights, and the primary purpose of good governance is to secure those rights, now and forevermore.
This then is the promise, but the reality is that as time has gone on, America has transitioned from the necessity to defend itself as well as to unite the States together into one body politic, to building up its military-industrial-technology complex to such a degree that it represents the premier worldwide power that insists upon also being the world’s policeman. As big as this nation is in terms of territory and population, it is, in the scheme of things, not so big when we look at the world and its population. Further to the point, monies expended on the military are monies not spent on enhancing American citizens lives and livelihood, so that whatever the tribute that America insists upon collecting from being that empire is not sufficient to cover its expenses, and whenever a significant portion of that tribute essentially goes into private party’s hands, that presents itself to be a real problem, because an empire that does not have its own fiscal house in order and has no intention to correcting such, will inevitably decline and ultimately fall.
In truth, if America really believes that it has to be an empire, it would behoove America to be far less bellicose with other nations, and instead to make liaisons that are good for trade on both sides. Instead, America too often insists upon using force as a cudgel and believes somehow that its military force will get nation after nation to submit to its dictates and its exploitation of the same, but recent history shows that America gets that wrong, again and again. So too, America has zero interest in seeing that democracy, self-determination, and good Constitutional government be spread throughout the world, but actually prefers to work almost exclusively with dictatorial nations, which America believes makes it easier to conduct business, while continually discounting that this also breeds a whole lot of foreign citizen dissatisfaction.
It is well to remember that it isn’t so much that an American empire couldn’t be successful, because it could be if it was done right, but rather it's because America insists upon getting what it wants through military force, which typically violates international laws and is clearly inhumane via the punishment and death doled out to foreign civilians. All of this sets the example that America is no paragon of virtue, and what it professes to believe in is an absolute lie, which signifies that America deserves little or no respect, because it does not respect others, and because America has extended itself so far, it is vulnerable to being hurt in so many different ways, so that it is inevitable that there will be an unraveling of America, first slowly, and then suddenly, till the empire is no more.