According to those who claim to understand Marxism but do not, in other words those that claim to understand Marxism the loudest, Marx dealt with reality like “cold, dead matter.” Of course, the authors of these theories have to resort to resolutions so flimsy that they can be seen through like glass, such as this idea of Marx viewing the universe as plainly deterministic, which is an old and annoying anti-Marxist straw man. To believe it, you would have to have no knowledge of Marx and Engels’ dealings with conflict and contradiction in matter, no knowledge of dialectics and basically have not read any Marx for your entire life, not even in High School.
In fact, Marx offered a complete crisis theory inherent in capitalism. The formula c:v (constant capital : variable capital), works initially to accelerate, but then to crash the long-term development of mankind’s means of production proportional to labor power, M:L. This gives rise to the concept of “financial crisis,” which is built into the “boom and bust” style of capitalism. Because the advancement of the means of production to labor power is the source of all material progress and social progress, it’s therefore not hard to argue that capitalism is an unsustainable system – one that inhibits social, productive and political development.
Despite the simplicity of the notion that capitalism is prone to surpluses followed by crises, and is unsustainable in the long-term because it operates like a pyramid scheme, it has never been grasped by bourgeois economists, for how can a class admit its own eventual, inevitable death if it is to remain in power? The intellectuals like the Austrian School of Economics work for the bourgeoisie as loyal servants.
In summation, the alternative to overthrowing capitalism is fascism, which will bring humanity to barbarism and destroy whatever progressive elements capitalism has created. For more on this, check out the section in Marx’s Capital entitled, “The Law of the Tendency for the Rate of Profit to Fall.” Adam Smith tried pitifully to rebuke it, as has everyone else. So far (do not faint!) no one has.