“Marx’s most important theory/system is called “dialectical materialism.” “Dialectical” refers to how opposites interact to produce change, and “materialism” means that everything has a material (i.e., physical) existence that interacts with other things in a mechanical way. In a nutshell, dialectical materialism is a system for producing change by observing and influencing the “contradictions” of “opposites” that produce “struggles” that, when resolved, produce progress. Marx meant it to apply to everything. The conflict and struggle between the classes that is manifest in the conflict between capitalism and communism is just one of many such examples.”