One of the greatest philosphers of the 20th century was Ayn Rand. She spent her life making people uncomfortable. Rand, who wrote "The Fountainhead," and "Atlas Shrugged," was almost completly responsible for the Objectivist theory.
"Rand advocated an ethics of rational self-interest. The hero of her best-selling Atlas Shrugged states, “I swear—by my life and my love of it—that I will never live for the sake of another man, nor ask another man to live for mine.” The moral purpose of anyone’s life is his or her own happiness; he or she exists to serve no other individual or group. The moral standard by which one guides one’s actions is set by the objective requirements of human life. Thus, Rand rejected two common theses in ethical theory: that selfless sacrifice is moral and that acting in one’s self-interest means doing whatever one feels like. She rejected as “moral cannibalism” any form of altruism—that is, any claim that the selfless sacrifice of some humans for the benefit of others is moral. She also argued that, since feelings are not tools of cognition, they are not reliable guides to action; hence, one must rationally define the principles of action that will allow one to achieve the values necessary to sustain one’s life."