When we talk about the philosophy that forms the basis of Marxism-Leninism, we say that that philosophy is dialectical materialism. At this point in our series on the theoretical concepts of Marxism-Leninism, we are going to focus on the materialism of dialectical materialism and try to come to a clear understanding of what that means. And to do that, we’re going to also look at materialism’s philosophical opposite: idealism.