Who wrote "The Communist Manifesto"?

"The Communist Manifesto" was authored by Karl Marx and Friedrich Engels, making that the correct choice. This influential political pamphlet, published in 1848, serves as a foundational text for modern communism and outlines the class struggles and problems of capitalism. Marx and Engels aimed to challenge the prevailing capitalist systems and advocate for a revolutionary path to a classless society.

The partnership between Marx and Engels is critical to understanding the manifesto's context and content, as they combined Marx's theories about historical materialism and economic class structures with Engels' insights into social conditions of their time. This collaboration not only provided the theoretical framework necessary for their arguments but also helped disseminate their ideas across Europe, influencing various labor movements and political ideologies.

The other authors listed in the other options, such as Lenin, Trotsky, Mill, Hobbes, Orwell, and Camus, were significant figures in their own rights but wrote on different subjects and contexts. Their works do not pertain to "The Communist Manifesto," which distinctly connects to Marx and Engels' vision for a revolutionary change in society.