Barthes' earliest work was very much a reaction to the trend of existentialist philosophy that was prominent during the 1940s, specifically towards the figurehead of existentialism Jean-Paul Sartre. In his work What Is Literature? (1947) Sartre finds himself to be disenchanted with both established forms of writing, and more experimental avant-garde forms, which he feels alienate readers. Barthes’ response is to try to find what can be considered unique and original in writing. He determines in Writing Degree Zero (1953) that language and style are both matters that appeal to conventions, and are thus not purely creative. Rather, form, or what Barthes calls ‘writing’, the specific way an individual chooses to manipulate conventions of style for a desired effect, is the unique and creative act. One’s form is vulnerable to becoming a convention once it has been made available to the public. This means that being creative is an ongoing process of continual change and reaction. He saw Albert Camus’s The Stranger as an ideal example of this notion for its sincere lack of any embellishment or flair.

In Michelet, a critical look at the work of French historian Jules Michelet, Barthes continues to develop these notions and apply them to broader fields. He explains that Michelet’s views of history and society are obviously flawed, but that in studying his works one should not seek to learn from Michelet’s claims. Rather, one should maintain a critical distance and learn from his errors. Understanding how and why his thinking is flawed will show more about his period of history than his own observations. Similarly, Barthes felt avant-garde writing should be praised for maintaining just such a distance between its audience and its work. By maintaining an obvious artificiality rather than making claims to great subjective truths, avant-garde writers assure their audiences maintain an objective perspective in reading their work. In this sense, Barthes believed that art should be critical and interrogate the world rather than seek to explain it like Michelet would.