Query: What is the occupation of Sami Hajjar?
Context: His Arab nationalist views led him to believe that there needed to be unity across the Arab world, combining the Arab nation under a single nation-state. He described his approach to economics as "Islamic socialism", although biographers 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. Gaddafi saw his socialist Jamahiriyah as a model for the Arab, Islamic, and non-aligned worlds to follow.