Marx believed he had provided a comprehensive account of the inner dynamics of capitalist social organization. According to those who understand him to have offered a complete crisis theory, Marx demonstrated that the particular form social investment takes under capitalism, c:v (constant capital : variable capital), works initially to accelerate, but latterly to strangle the long-wave development of mankind's means of production proportional to our labour power, M:L. Given that the advancement of M:L is the foundation of all material progress and thus social progress for Marx, proving that capitalism retards M:L is all the proof Marx needed that capitalism was becoming obsolete. The alternative to replacing capitalism would be for its ever-present crisis to drag humanity back to barbarism, destroying the gains accumulated to date.
Marx's precise workings-out, with their reliance on a customized version of the dialectic method Marx salvaged from Hegel, resist summarization - indeed, most readers find Capital I impenetrably dense as it stands. An attempt was made to re-present aspects of them in a mathematical form in the work of Henryk Grossmann. Central to the argument is the claim that, within a given business cycle, the accumulation of surplus from year to year leads to a kind of top-heaviness, in which a relatively fixed number of workers have to add profit to an ever-larger lump of investment capital. This observation leads to what is known as Marx's "law" of the declining rate of profit. Unless certain countermeasures are available to be taken, the exponential growth of capital out-paces the growth in labor productivity, so the profits of economic activity have to be shared out more thinly among capitals, i.e., at a lower profit rate. When countermeasures are unavailable or exhausted, the system requires the destruction of capital values in order to return to profitability.
The place of crisis theory within Marxian theory as a whole is contested. According to certain commentators, there is no theory of crisis specified within Marx's own writings. By this view, crisis theory is the creation of subsequent interpreters of Marx who are usually taken to have misunderstood his work. According to others, the entirety of the work of Marx's three volume critique, Capital, is a demonstration that the capitalist form of social organization necessitates sharp reversals in social progress and wealth creation.
Further to this basic disagreement are several separate disputes over the viability of Marx's laws of value relations - for one example, whether or not it is properly treated of as a Labor theory of value - for another, whether Marx's attempted translation of his values into concrete prices is successful.
As a consequence of the commonly accepted criticisms of Marxian theory of value, crisis theory has little resonance beyond Marxian political currents and their immediate critics.