What is the essence of Western existentialist philosophy

Freedom is the essence of Western existentialist philosophy. Existentialism centers on human beings, respects their individuality and freedom, and believes that human beings live in a meaningless universe, and that human existence itself is meaningless, but that human beings can make themselves and live a wonderful life on the basis of their existence. The Latin word existentialism, existentia, means existence, survival, actualization. Existentialist philosophy deals not with the traditional philosophy of abstract consciousness, concepts, and essences, but focuses on existence and on life. But also does not refer to the reality of human existence, but refers to the existence of the spirit, the kind of human psychological consciousness (often anxiety, despair, fear and other low consciousness, pathological psychological consciousness) with the social existence and the reality of the individual in opposition to the existence of the individual, as the only real existence. Sartre is the founder of existentialist philosophy, and his famous assertions such as "existence precedes essence" and "the other is hell" have influenced many people. According to Sartre, when a human being is born, he has no essence, the essence is acquired and freely chosen by human consciousness. It is because of the free choice of human beings that the essence of human beings is not fixed, and the me of today is not the me of yesterday. The choice of consciousness is a very pure and personal thing, everyone's choice is different, so the essence of man is also different. Sartre After World War II, existentialism took an important place in French thought, establishing Christian existentialism. Some writers, propagating it through literary creation, expanded the influence of existentialism. Existentialism in France was basically divided into two major schools: Christian existentialism, represented by Simone Weil and Gabriel Marcel; and atheistic existentialism, represented by Jean-Paul Sartre, Albert Camus, and de Beauvoir, which was also known as Sartre's existentialism, or simply existentialism. France was full of negative decadence and pessimism in World War II, and a trend of cynicism and debauchery due to bitterness, loneliness, abandonment, and inability to find a way out developed among intellectuals. As a result, Sartre's existentialism, which boasted that the life, freedom and existence of the individual were put in the first place, gained great popularity and was regarded by the bourgeoisie and intellectuals as the most fashionable philosophy. By the 50s and 60s, it became the most popular philosophical trend in Europe. Existentialism is a philosophical non-rationalist trend to emphasize the individual, independence and subjective experience. It was first proposed by Friedrich Nietzsche. S?ren Kierkegaard, Schopenhauer, Jaspers, and Martin Heidegger can be seen as its forerunners. Especially in the 20th century it circulated very widely. The French philosopher Sartre and the writer Albert Camus are its representatives. Its most famous and explicit initiative is Sartre's maxim: "l'existence précède l'essence" (existence precedes essence). By this he means that there is no heavenly morality or extracorporeal soul apart from human existence. Both morality and soul are created by man in his existence. Man is not obligated to adhere to a particular moral standard or religious belief; man has the freedom of choice. To evaluate a person, evaluate what he does, not what he is, because a person is defined by his actions. Existentialism denies the existence of God or any other predefined rules. Sartre rejects any "resistance" factors in life because they reduce the scope for free choice. If there were no such resistance, then the only problem for a man to solve would be which path he chooses to follow.