Karl Marx is the most influential political philosopher of the past 150 years. Understanding him is essential to understanding post-WWII Europe, American foreign policy, China and North Korea today, and even much of the rhetoric in contemporary politics in the United States. Many short introductions to Marx are superficial and uncritical, providing little help to the reader. William Dennison’s concise two-part volume cuts to the heart of the matter. Dennison first highlights the key features of Marx’s worldview, including some common grace insights. But his final focus is analysis and critique as he uncovers Marx’s internal contradictions, examines the inherently religious nature of his anti-religious materialism, and documents the horrifying effects of his political philosophy—horrors consistent with Marx’s convictions.