Guy Debord was a French Marxist theorist, filmmaker, and founding member of the Situationist International, a group that sought to critique modern capitalist society. Born in 1931, he is best known for his book, The Society of the Spectacle, published in 1967, which argues that social life is increasingly dominated by images and representations, leading to alienation and a loss of authentic experiences. Debord's work emphasized the importance of direct experiences and the need to challenge the status quo through creative and revolutionary practices. His ideas have influenced various fields, including art, politics, and cultural studies, and continue to resonate in contemporary discussions about media and consumerism.