The 20th century is known as a period of awakening and radical movements in the history. New systems of thought emerged during this period. Some systems of thought expressed a direct return to man. The beginning of the return to man was set by S. Kierkegaard with his views related to existentialism. The emergence of existentialism as a philosophical system coincides with the period after the First World War. In this period, the loss of previous values, the problem of secularism, (...) and the failure of the Enlightenment philosophy to justify itself are among the main problems. Existentialism began to take shape in Germany and France at about the same time, and in a short time it spread to many parts of the world - Italy, Spain, Latin America, India, England, the United States, Japan, etc. spread to countries. In Russia, the school of existentialism was created by N. Berdyayev and L. Shestov, and the German existentialism was created by Martin Heidegger and Karl Jaspers. The prominent representatives of French existentialism are Gabriel Marcel (1899), Jean Paul Sartre (1905-1980), Simone de Bavoir (1908-1986) and Albert Camus (1913-1960). It was Jean-Paul Sartre who perfectly placed the idea of individual human freedom at the center of his work. There are two important points in Sartre's philosophy: existence in itself and existence for itself. Sartre writes that; what is generally called consciousness is individual. The purpose of consciousness is to make existence for us. This is the fundamental state of consciousness. The main issue that Sartre took into account is that it is impossible to look at the philosophical problems of the 20th century in the context of general concepts. According to the philosopher, the best existentialism is humanism. In addition to his philosophical novels, Sartre became famous for his existentialist philosophy, which he developed in a unique way. He was one of the thinkers who marked the 20th century with his formation of existential Marxism and his political activity. In the conditions of the Second World War, when the concept of humanity was questioned, the work "Being and Nothingness", which is original and intertwined with life in every way, explains the current state of humanity along with Sartre's philosophical ideas. (shrink)