Colin J. Campbell (24 July 1931 – 13 November 2022) was a British petroleum geologist who predicted that oil production would peak by 2007. He claimed the consequences of this are uncertain but drastic, due to the world's dependency on fossil fuels for the vast majority of its energy. His theories have received wide attention but are disputed and have not significantly changed governmental energy policies at this time. To deal with declining global oil production, he proposed the Rimini protocol. Wikipedia