Thomas Hobbes believed that in a state of nature where everyone is free, life would be "nasty, brutish and short" due to fear, violence and self-interest. Only by giving up individual sovereignty and freedom to an authoritarian ruler can security be achieved for all. In contrast, John Locke believed people are rational and can govern themselves. He advocated for a social contract where people consent to a government that protects private property and is accountable to the people, as life, liberty and property are more important than absolute authority. Government should justify its actions through popular consent.