Muammar Muhammad Abu Minyar al-Gaddafi[pron 1] (c. 1942 – 20 October 2011) was a Libyan revolutionary, politician and political theorist who ruled Libya from 1969 until his assassination by rebel forces in 2011. He came to power through a military coup, first becoming Revolutionary Chairman of the Libyan Arab Republic from 1969 to 1977 and then the 'Brotherly Leader' of the Great Socialist People's Libyan Arab Jamahiriya from 1977 to 2011. Initially ideologically committed to Arab nationalism and Nasserism, Gaddafi later ruled according to his own Third International Theory.