 In his view, ideologies like Marxism and Zionism were alien to the Islamic world and were a threat to the ummah, or global Islamic community.Nevertheless, Blundy and Lycett noted that Gaddafi's socialism had a "curiously Marxist undertone", with political scientist Sami Hajjar arguing that Gaddafi's model of socialism offered a simplification of Karl Marx and Friedrich Engels' theories.While acknowledging the Marxist influence on Gaddafi's thought, Bearman stated that the Libyan leader rejected Marxism's core tenet, that of class struggle as the main engine of social development.