Existentialism is a belief of placing importance on individualism, freedom, and decision. It emphasizes one's existence and the problems that come with it. Existentialism also uses subjectivity. One's ardent choices and actions are important. Personal experience and knowledge and acting upon one's own beliefs are important when arriving to one's personal development or truths. Decisions also play significant roles. Since one learns from making choices, one should have the freedom to make choices. It is impossible to not make choices because every single one of our actions is based on a decision.
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Alienationis a state of depersonalization or loss of identity in which the self seems unreal, thought to be caused by difficulties in relating to society and the resulting prolonged inhibition of emotion. In sociology and critical social theory, alienation refers to an individual's estrangement from traditional community.