How does Objectivism connect reason with human survival?

In the philosophy of Ayn Rand, Objectivism posits that life is the ultimate value for all organisms, as it serves as the standard by which all other goals are evaluated. Because Rand identified life as the fundamental value, she argued that "reason is man’s basic means of survival."1

Consequently, rationality is considered the highest human virtue. For a human being, the ultimate value is not merely biological existence, but life as a "rational being." This standard requires an individual to act in accordance with the cardinal values of reason, purpose, and self-esteem. By exercising rationality, individuals gain and keep the values necessary to sustain their lives and achieve happiness, which Rand defined as the state of consciousness resulting from the achievement of one's values. In this framework, actions that preserve one's life as a rational being are considered good, while those that threaten or destroy it are viewed as evil.1