This article will explore all aspects of the literary movement first present in the 19th century, existentialism. It will discuss the different climates, including social, political, and economic, during which the literary movement was present. By combining the basic dictionary definition and the many interpretations that writers glean from existentialism, the information provided will deepen your understanding of the origins, popularity, and breadth of the topic. Touching on the works of famous existentialist writers, including Jean-Paul Sartre, Franz Kafka, Luigi Pirandello, and Albert Camus, this article will cover the entire period of existentialism. To question the idea that existentialism has influenced society's way of thinking, the way people perceive others and, above all, the way people define their own being is absurd. It is quite evident that this philosophy has shaped the world and, in turn, transformed the climate into an introspective climate. According to the Merriam Webster Dictionary (2011), existentialism is defined as "a primarily 20th-century philosophical movement that embraces several doctrines but is centered on the analysis of individual existence in an unfathomable universe and the plight of the individual who must take ultimate responsibility for acts of free will." without any certain knowledge of what is right or wrong, good or bad." A basic definition, however, will not be sufficient to truly understand this movement and, therefore, an analysis of existentialism will help to reveal the different aspects of this well-known literary movement. Existentialism was born in a difficult period of history. First emerged in the late 19th century, existentialismThe world had a strong sympathy for the existentialist movement United, France, Russia and Germany have given birth to different writers and philosophers. Literary minds such as Jean-Jacques Rousseau, Jean-Paul Sartre, Albert Camus, Franz Kafka, Ralph Ellison, Luigi Pirandello and Fyodor Dostoevsky have fallen. under the label of existentialist writers, although many writers refrain from conforming to the title. Therefore, to match the variance of people who may or may not call themselves existentialists, but actually are, existentialism can be found not only in the novels of fantasy, but also in analytical articles, memoirs and non-fictional pieces. The works produced, from Camus's The Stranger to Sartre's essay entitled "Truth and Existence", epitomized the existentialism movement and covered all the complexities of the period. Ultimately, existentialism was an important movement in the 20th century and was the basis for a transformation for the entire world.