Those above words come from the most seminal document in America's history -- which is its Declaration of Independence, of which that Declaration was the inspirational rallying point for the colonists to rise up against their oppressive English governance, and to thereby ultimately create a government, of the people, by the people, and for the people. This thus means that the only real reason why America represents itself as being the last best hope of mankind is the fact that its Declaration made it clear that America truly believes that all of humankind has been created equally and further that our birthright into this world, consists of unalienable rights, which no legitimate nation can ever take away from its people.
Of course, many nations and most civilizations have been ostensibly built upon noble words and noble thoughts, of which, quite unfortunately, the actual practice of these underlying principles, have often been found wanting. Regrettably, America is one of those nations, that both claims as well as professes lovely sentiments, but the reality of the situation which is demonstrated through its executive actions, legislative acts, and judicial decisions, proves that America does not come even close to being what it was founded to actually become.
For instance, one's status in America most definitely matters in regards to how much equality and fairness a given person gets; so that how one is thereby treated in this country, is often dependent upon one's racial characteristics, religious faith, income, wealth, education, gender, and family background or origin. That is to say, rather than all American citizens being subjected equally to the same legislative acts, the same judicial decisions, as well as the same executive actions, in a manner which is consistent to the fact that all are created equally, and that all have the same unalienable rights, we find that this is violated constantly and consistently in a manner in which the few reap special benefits, whereas the masses, as well as specific un-favored people, suffer thereby the ill or unfair consequences.
As it has been said, a house divided cannot stand, and further a house divided will ultimately be either all of one thing, or all of the other. Clearly, an impartial and honest look into the character of America, indicates that America is most definitely not a country of egalitarian principles, though it preaches such; nor is it a country of equal opportunity, though it claims such; nor is it a country in which justice is impartial, consistent, and fair though it pretends such; but rather it is a country, that has permitted itself to devolve into something in which one's life, liberty, and pursuit of happiness are often under assault by the very government that is supposed to uphold those very principles.
When any country becomes destructive to those truths that are self-evident, then that country has lost not only its moral compass, but has foregone its right to be considered the true representatives of the people, for by its actions it has effectively lost the people's voluntary consent. This does not mean that all is lost, but rather, it does mean that a nation that has lost its rightful purpose and its rightful direction must need to go back to its founding principles and thereby to live up to them, or else its foundation will surely give way, for it will not stand.