Information:  - National Review (NR) is a semi-monthly magazine founded by author William F. Buckley Jr. in 1955. Although the print version of the magazine is available online to subscribers, the free content on the website is essentially a separate publication under different editorial direction. The online version, "National Review Online", describes itself as "America's most widely read and influential magazine and web site for conservative news, commentary, and opinion."  - Karl Marx (5 May 1818  14 March 1883) was a German-born scientist, philosopher, economist, sociologist, journalist, and revolutionary socialist. Born in Trier to a middle-class family, he later studied political economy and Hegelian philosophy. As an adult, Marx became stateless and spent much of his life in London, England, where he continued to develop his thought in collaboration with German thinker Friedrich Engels and published various works, the most well-known being the 1848 pamphlet "The Communist Manifesto". His work has since influenced subsequent intellectual, economic, and political history.  - Friedrich Engels (or  28 November 1820  5 August 1895) was a German philosopher, social scientist, journalist, and businessman. He founded Marxist theory together with Karl Marx. In 1845, he published "The Condition of the Working Class in England", based on personal observations and research in Manchester.  - James Burnham ( November 22 , 1905 -- July 28 , 1987 ) was an American philosopher and political theorist . A radical activist in the 1930s and an important factional leader of the American Trotskyist movement , in later years Burnham left Marxism and turned to the political Right , serving as a public intellectual of the American conservative movement , and producing the work for which he is best known , The Managerial Revolution , published in 1941 . Burnham is also remembered as a regular contributor to America 's leading conservative publication , National Review , on a variety of topics .  - Marxism is a method of socioeconomic analysis that analyzes class relations and societal conflict using a materialist interpretation of historical development and a dialectical view of social transformation. It originates from the mid-to-late 19th century works of German philosophers Karl Marx and Friedrich Engels.  - William Frank Buckley Jr. (born William Francis Buckley; November 24, 1925  February 27, 2008) was an American conservative author and commentator. He founded "National Review" magazine in 1955, which had a major impact in stimulating the conservative movement; hosted 1,429 episodes of the television show "Firing Line" (19661999), where he became known for his transatlantic accent and wide vocabulary; and wrote a nationally syndicated newspaper column along with numerous spy novels.    Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'james burnham'.  Choices: - author  - intellectual  - journalist  - major  - philosopher  - scientist  - social scientist  - sociologist  - spy
The answer to this question is:
sociologist