The cultural celebration of the "self-made man," the person who advances in society by virtue of hard work and perseverance, is an example of which core american political belief?

The answer is "individualism".

Encouraged people to trust in themselves and their own inner voices and to revolt against standard and constant ways of conduct.

Individualism, understood not only as confidence as well as monetary independence, has been a focal subject in American history (frontiers saints who conquered the wild alone, ranchers whose achievement relied upon their capacity to go up against the hardships of land and creativity, the festival of the little businessperson who turned into a money related accomplishment all alone; singular proprietorship in business is still lauded as the perfect).