Many Americans don't believe in evolution, yet the society they created is based on the most commonly recognized law of nature: survival of the fittest. It is a cruel law where the weak are sacrificed for the survival of the species.
In American society the same rule applies, only your physical attributes are replaced by your ability to make and control money. In spite of centuries of human progress, community building, compassion and tribal mentality of human kind, this country, unlike any civilized nation, still favors individualism and success at any cost.
Social programs for the "unwashed masses" of necessary labor and consumers are considered necessary evils to keep the "weak" in check, but many American realities and cruelty such as foreclosures and the like simply don't exist and would be unthinkable elsewhere in civilized world.