Written in 1970 by a prominent Marxist philosopher and student of Georg Lukács, this book argues that alienation is the central idea in all of Karl Marx's work. To distinguish Marx's original concept from its use by other writers over the years, the topic is approached in three different ways. First, the origin of the idea of alienation is discussed along with an analysis of the way Marx structured it into a theory. Then alienation is explored beyond its political aspect, as it has been used in economics, ontology, moral philosophy, and aesthetics. The contemporary usefulness of the term is covered in the last section of the book, which concludes that current debates about the individual in society and the role of education can be fruitfully discussed in terms of alienation.