<human>:  Who was the founder of the Situationist International?
<bot>: The Situationist International was founded in 1957 by Guy Debord. The Situationist International was a group of people who believed that society should be transformed through the use of revolutionary tactics. Debord is considered the most influential member of the Situationist International. He wrote the book, “The Society of the Spectacle”, which was a manifesto that outlined the principles of the Situationist International.