Politics of Libya under Muammar Gaddafi
From 1969 to 2011, the politics of Libya were determined de facto by Muammar Gaddafi, who had been in power since his overthrow of the Kingdom of Libya in 1969. Gaddafi abolished the post-1951 Libyan Constitution and introduced his own political philosophy, based on his Green Book published in the 1970s.
Source: Wikipedia — Politics of Libya under Muammar Gaddafi (CC BY-SA 4.0)