By the early 20th century, Marxism was the dominant ideology of the left, especially in Europe. Marxism spread significantly around the world after the two world wars, but Marx’s prominence went into abrupt decline in 1991, with the collapse of the Soviet Union. Since then, China has been the most significant avowedly Marxist country. ‘Is Marx still relevant?’ considers whether Marx’s views are still relevant when dealing with worldwide inequality, global financial crises, the age of globalization, and climate change. It concludes that Marx’s ideas about the role that economic interests play in our intellectual and political lives will remain relevant, but that his prediction of the inevitability of a proletarian revolution will not.