Guy Debord was French Marxist theorist, philosopher, author, and filmmaker who was born in 1931 and died in 1994. Debord was a member of the Letterist International, a Paris-based collective of radical artists and theorists between 1952 and 1957. He was also a founding member of Situationist International, an organization of social revolutionaries made up of avant-garde artists, intellectuals, and political theorists, prominent in Europe from 1957 to 1972. Debord authored The Society of Spectacle, a work of philosophy and critical Marxist theory.

In 1963, the journal Internationale Situationniste, a publication of the Situationist International Movement, published Debord's phrase "Ne Travaillez Jamais" with an accompanying photograph. On June 27, 1963, Guy Debord sent a letter to the organization Cercle de la Librairie in response to a letter on their part which demanded a compensation for the use of their intellectual property. Debord had used the photo from the postcard by Louis Buffier. In this letter, Debord asserted that the graffiti was his creation.

Sources: Guy Debord. (n.d.). Retrieved October 4, 2018, from http://www.notbored.org/debord.html. Ne travaillez jamais. (n.d.). Retrieved October 4, 2018, from http://www.artandpopularculture.com/Ne_travaillez_jamais.

Louis Buffier was a French postcard maker active during the 1960s. No additional biographical or historical information is avaiable at this time.

Source: Louis Buffier. (n.d.). Retrieved October 4, 2018, from http://www.artandpopularculture.com/Louis_Buffier.