Marxism is indeed more than just an analytical framework; it is fundamentally a political theory of action, or 'praxis,' that demands a commitment to its core principles for the purpose of revolutionary social transformation. Karl Marx and Friedrich Engels did not merely seek to understand the world but to change it, famously stating, 'The philosophers have only interpreted the world, in various ways; the point is to change it.'

At its heart, Marxism posits a materialist conception of history, arguing that societal development is driven by class struggle, particularly between the bourgeoisie (owners of the means of production) and the proletariat (wage laborers). This analysis is not an end in itself but a means to identify the inherent contradictions within capitalism – such as exploitation, alienation, and recurring crises – which Marxists believe will inevitably lead to its downfall.

The 'action' aspect of Marxism is manifested in its call for a proletarian revolution. Marxists believe that the working class must become conscious of its historical role, unite, and overthrow the capitalist system. This revolutionary act is not a spontaneous event but requires organized political action, often through a vanguard party, to seize state power and establish a 'dictatorship of the proletariat.' This transitional phase is intended to dismantle capitalist structures and pave the way for a classless, communist society where the means of production are collectively owned.

The demand for 'strict compliance with its core principles' stems from this revolutionary imperative. For Marxism to achieve its stated goals, adherents must not only intellectually grasp its theories but also actively participate in the class struggle and adhere to the strategic and tactical directives derived from Marxist analysis. Deviations from core principles – such as the belief in the necessity of revolution, the centrality of class struggle, or the ultimate goal of communism – are often seen as undermining the revolutionary project. For instance, reformist approaches that seek to ameliorate capitalism rather than abolish it are typically viewed as betrayals of Marxist principles, as they are perceived to perpetuate the very system Marxism seeks to overcome.

Historically, this demand for strict compliance has led to both the strength and the rigidity of Marxist movements. It has provided a clear ideological compass and a powerful mobilizing force for revolutionary change, as seen in the Russian and Chinese revolutions. However, it has also contributed to dogmatism, intolerance of dissent, and the suppression of alternative interpretations within Marxist-Leninist states, where adherence to official doctrine became paramount. Critics argue that this 'strict compliance' can stifle intellectual inquiry and lead to authoritarianism, while proponents maintain that such discipline is necessary for effective revolutionary action against a powerful and entrenched capitalist system.