Existentialists

Existentialism is a philosophical movement that views human existence as having a set of underlying themes and characteristics, such as anxiety, dread, freedom, awareness of death, and consciousness of existing, that are primary. That is, they cannot be reduced to or explained by a natural-scientific approach or any approach that attempts to detach itself from or rise above these themes. Human beings are exposed to or, to use the philosopher Martin Heidegger's phrase, "thrown" into, existence.

Existentialists consider being thrown into existence as prior to, and the horizon or context of, any other thoughts or ideas that humans have or definitions of themselves that they create. This is part of the meaning of the assertion of the philosopher Sartre, one of the founders of existentialism, "existence is prior to essence".

Existentialism conceives of Being itself as something that can only be understood through and in relation to these basic characteristics of human existence. For existentialism, human beings can be understood only from the inside, in terms of their lived and experienced reality and dilemmas, not from the outside, in terms of a biological, psychological, or other scientific theory of human nature. It emphasizes action, freedom, and decision as fundamental to human existence and is fundamentally opposed to the rationalist tradition and to positivism. That is, it argues against definitions of human beings either as primarily rational, knowing beings who relate to reality primarily as an object of knowledge or whose action can or ought to be regulated by rational principles, or as beings who can be defined in terms of their behavior as it looks to or is studied by others. More generally it rejects all of the Western rationalist definitions of Being in terms of a rational principle or essence or as the most general feature that all existing things share in common.

Existentialism tends to view human beings as subjects in an indifferent, objective, often ambiguous, and "absurd" universe in which meaning is not provided by the natural order, but rather can be created, however provisionally and unstably, by human beings' actions and interpretations.

In terms of the existence and relevance of God, there are three schools of existentialist thought:
 * Atheistic Existentialism (Sartre),
 * Christian Existentialism (Kierkegaard)
 * and a third school that proposes that whether God exists or not is irrelevent to the issue of human existence- God may or may not exist (Heidegger.)

Although there are certain common tendencies among existentialist thinkers, there are major differences and disagreements among them, and not all of them even affiliate themselves with or accept the validity of the term "existentialism", which was popularized especially by Sartre.