"The Capital" is a foundational work by Karl Marx, published in 1867, in which he analyzes the functioning of the capitalist system and its economic, social, and political implications. Divided into three volumes (with the first published during his lifetime and the others organized posthumously by Friedrich Engels), the work examines the dynamics of capital, labor, and exploitation with the aim of revealing the internal contradictions of capitalism.

In the book, Marx explores concepts such as surplus value, which is the difference between the value produced by labor and the wage paid to the worker, forming the basis of capitalist profit. He also examines capital accumulation, class struggle, and economic crises, arguing that capitalism, by concentrating wealth in the hands of a few and generating inequality, inevitably leads to conflicts and social instability.

"The Capital2 is a profound and systematic critique of capitalism, aiming to expose the forces that lead to worker exploitation and alienation. The book became one of the foundations of socialist and communist thought, inspiring social and political movements across generations and is considered one of the most comprehensive and influential analyses of the capitalist economy.