This book by Frederick Engels explains the origins of the modem socialist movement. It is probably the most influential work expounding the basic ideas of Marxism, other than the Communist Manifesto.
As Engels himself explains in his introduction to the first English edition, published in 1892, it was drawn from three chapters of his 1878 book Anti-Dühring, a polemic against the views of Eugen Dühring, a professor at Berlin University. In his lectures and numerous writings which flooded the book market after 1869, Dühring claimed to be the originator of a “revolution in science” which superseded Marxism.
