Marxism is a political philosophy and method of socioeconomic analysis. It uses a dialectical and materialist interpretation of historical development, better known as historical materialism, to analyse class relations, social conflict, and social transformation. Marxism originates with the works of 19th-century German philosophers Karl Marx and Friedrich Engels. Marxism has developed over time into various branches and schools of thought, and as a result, there is no single, definitive "Marxist theory". Marxism has had a profound effect in shaping the modern world, with various left-wing and far-left political movements taking inspiration from it in varying local contexts.