Thomas R. Flynn said this quote

“ Existentialism is commonly associated with Left-Bank Parisian cafes and the ‘family’ of philosophers Jean-Paul Sartre and Simone de Beauvoir who gathered there in the years immediately following the liberation of Paris at the end of World War II. One imagines offbeat, avant-garde intellectuals, attached to their cigarettes, listening to jazz as they hotly debate the implications of their new-found political and artistic liberty. The mood is one of enthusiasm, creativity, anguished self-analysis, and freedom – always freedom.Though this reflects the image projected by the media of the day and doubtless captures the spirit of the time, it glosses over the philosophical significance of existentialist thought, packaging it as a cultural phenomenon of a certain historical period. That is perhaps the price paid by a manner of thinking so bent on doing philosophy concretely rather than in some abstract and timeless manner. The existentialists’ urge for contemporary relevance fired their social and political commitment. But it also linked them with the problems of their day and invited subsequent generations to view them as having the currency of yesterday’s news.Such is the misreading of existentialist thought that I hope to correct in this short volume. If it bears the marks of its post-war appearance, existentialism as a manner of doing philosophy and a way of addressing the issues that matter in people’s lives is at least as old as philosophy itself. It is as current as the human condition which it examines. ”