Objectivism is a philosophical belief that the reality of things is independent of people's experiences or feelings about them — so if a tree falls in the forest, and nobody hears it, it still makes a sound.
Objectivism gets its name from the idea that everything humans know and perceive is objective, existing in reality rather than being given meaning by the human mind. Reason, logic, and scientific proof are all primary tenets of objectivism; beliefs, perceptions, and feelings have much less importance. Novelist Ayn Rand borrowed the word objectivism as the name of her own philosophy, which says that the most rational way to live is to always act in your own self-interest.