Dialectical materialism is a philosophy of science, history, and nature. It was developed in Europe and is based on the writings of Karl Marx and Friedrich Engels. Marxist dialectics say that real-world condition such as class, labor, and socioeconomic interactions are important. This is a contrast to Hegelian dialectic, which says that contradictions in material phenomena can be resolved by analyzing them and finding a solution. Marx thought that the most effective solution to the problems caused by such contradictory phenomena was to address and rearrange the systems of social organization at the root of the problems.