"The Existentialism is a Humanism" is a short but comprehensive book that explains some of the basic elements of existentialist philosophy. Sartre tries to be simple in his explanations to avoid misunderstandings. The basic principles of existentialist philosophy are analyzed as Sartre makes some comparisons with other philosophical movements. Although the book can be used as an introduction to existentialism, it may oversimplify certain parts of the theory, so I think it is important for those who want to read it to be aware of this.

As for the content itself, I would say that it is easy to follow Sartre's reasoning and he presents his ideas in a structured way. There are some points that I found a bit difficult to understand as the terminology used is quite ambiguous. Also, as the ideas are presented, some flaws in Sartre's thinking can be observed. He confidently uses certain claims to build his arguments and presents some assumptions that he considers universal without sufficient reason.

However, this does not mean that significant conclusions do not emerge from this extensive analysis of the human condition. I found some of the observations regarding meaning, science, and especially ethics, very interesting. Overall, Sartre manages to clarify some elements of existentialism that are often misunderstood and have led to the popular image of existentialism that most of us are familiar with. In doing so, Sartre demonstrates how existentialism is indeed a humanism, as it is a philosophy that encourages action rather than a passive attitude towards life.

(Note: This book contains the text from Sartre's lecture of the same title. Some comments are added to the text for clarification, as well as the observations and questions raised by the audience after the speech.)