The chronological order of these works is: 'The Holy Family' (1845), 'The Poverty of Philosophy' (1847), 'The Communist Manifesto' (1848), and 'A Contribution to the Critique of Political Economy' (1859). This sequence reflects the development of Marx's thought from his early philosophical critiques to his later focus on political economy and revolutionary strategy.

Marxian Socialists are fundamentally committed to the concept of a planned economy. They argue that central planning is necessary to eliminate the inefficiencies and exploitation inherent in capitalist market systems. Therefore, claiming they are opposed to a planned economy is factually incorrect within the context of Marxist theory, which advocates for state or collective control over production.

Karl Marx distinguished between Utopian socialists, who proposed idealistic social reforms, and scientific socialists, who analyzed history through materialist dialectics. Friedrich Engels was Marx's closest collaborator and a co-founder of scientific socialism, not a Utopian socialist. Marx and Engels viewed their own work as a rigorous, scientific critique of capitalism, contrasting it with the earlier, speculative models proposed by thinkers like Saint-Simon and Fourier.

Marxist theory, specifically historical materialism, posits that the driving force of human history is the conflict between opposing social classes. In the Communist Manifesto, Marx and Engels argue that all recorded history is essentially a narrative of class struggle, where the ruling class exploits the labor of the oppressed, eventually leading to revolutionary change and the transition to new modes of production.

Marxism explicitly rejects the efficacy of peaceful, constitutional reform within a capitalist framework. Marx argued that the state is a tool of the ruling class, meaning that constitutional processes are inherently biased toward maintaining the status quo. Thus, claiming that Marxism emphasizes peaceful and constitutional change is a fundamental misrepresentation of its revolutionary core, which demands the total dismantling of the existing state structure.

Marxist theory is built upon these four pillars. Dialectical materialism provides the philosophical method, which is applied to history (Historical Materialism). This leads to the analysis of economic exploitation (Theory of Surplus Value) and the resulting social friction (Doctrine of Class Conflict). The provided answer 'A' lists these concepts, though the internal logical sequence is often debated by scholars.

Karl Marx was born on May 5, 1818, in Trier, which was then part of the Kingdom of Prussia, now located in modern-day Germany. His intellectual development was deeply influenced by German philosophy, particularly the works of Hegel and Kant, before he expanded his studies into economics and politics while living in various European cities.

Marxist communism advocates for the abolition of private property and the transition to collective or state ownership of the means of production. By removing private control over factories, land, and resources, the theory aims to eliminate class exploitation and ensure that production is organized to meet human needs rather than to generate private profit, ultimately leading to a society where resources are managed for the common good.

Karl Marx, in collaboration with Friedrich Engels, posited that the history of all hitherto existing society is the history of class struggles. He argued that the conflict between the bourgeoisie (owners of the means of production) and the proletariat (the working class) is the primary driver of historical change. This theory serves as the foundation for Marxist political thought and the eventual transition toward a classless society.

The provided answer key suggests 'Reforming capitalism,' which contradicts the standard interpretation of Marxian thought, which advocates for the total abolition of the capitalist mode of production. Marxists view capitalism as inherently exploitative and incapable of being reformed into a just system. This answer key may reflect a specific, non-standard interpretation or a potential error in the source material.