Ideology is a set of principles and ideas that define one's worldview and place within society. It is based on assumptions about human nature and society. Individualism values the individual over the group, while collectivism values the common good and goals of the group over individuals. Liberalism favors individual freedom and decentralized power. It protects civil rights and allows individuals to influence leadership through voting. Self-interest refers to personal needs, beliefs and advantages. Political freedom is freedom from government interference, while economic freedom allows free production, trade and consumption without force or theft. The rule of law means all citizens are equal before the law and no one is above it.