I just need a quick explanation on question 2 on this response thanks

Option 1: Understanding Marx and Marxism Among the most prominent forces in the 20th century were battles involving economic systems. The free market vs communism threat involved nearly 70 of those years, with, at some time, perhaps 3040% of the world's population under regimes claiming communism and its Marxist heritage. Wow! Marx had quite an impact. That would mean that to understand something that affected the entire planet across almost the entire century, you had to understand Marxism and its ideas. And it wasn't simply economic arrangement, Marx had an entire philosophical View that led him to communism. 1. What was the philosophical position of Marx? 2. If Marx was correct in his view about reality, problem did Marx realized that meant for humanity choosing to direct itself into a more just future of communism? Why did he need to argue that communism was inevitable? Now that communism has failed, that it wasn't inevitable, what does that mean for humanity philosophically, and Marx's metaphysical view in particular? P93