What is Americanism? It's about being an American and understanding what that means: Life, Liberty and the pursuit of Happiness for ALL citizens. Understanding that this is a great country, not taking that in arrogance but rather by the grace of God. A country where everyone gets a shot at greatness; where true equality exists and no one is bound by class, race or gender in society. In other words, being an American means that no matter what your stake in life when you are born, you have a chance at succeeding here.
You may want to refer to the TEXTBOOK OF AMERICANISM by Ayn Rand. The subject of these articles was limited to the sphere of politics, for the purpose of defining and clarifying the basic principles involved in political issues.
The Declaration of Independence: When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
The Constitution of the United States of America: We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.
The Bill of Rights: THE Conventions of a number of the States, having at the time of their adopting the Constitution, expressed a desire, in order to prevent misconstruction or abuse of its powers, that further declaratory and restrictive clauses should be added: And as extending the ground of public confidence in the Government, will best ensure the beneficent ends of its institution.