The Communist Manifesto

The Communist Manifesto (originally Manifesto of the Communist Party) is an 1848 political pamphlet by German philosophers Karl Marx and Friedrich Engels. Commissioned by the Communist League and originally published in London (in German as Manifest der Kommunistischen Partei) just as the revolutions of 1848 began to erupt, the Manifesto was later recognised as one of the world's most influential political documents. It presents an analytical approach to the class struggle (historical and then-present) and the problems of capitalism and the capitalist mode of production, rather than a prediction of communism's potential future forms.
The Communist Manifesto summarises Marx and Engels' theories about the nature of society and politics, that in their own words, "The history of all hitherto existing society is the history of class struggles". It also briefly features their ideas for how the capitalist society of the time would eventually be replaced by socialism. Source: Wikipedia

Karl Heinrich Marx (5 May 1818 - 14 March 1883) was a German philosopher, economist, historian, sociologist, political theorist, journalist and socialist revolutionary.
Marx completed his doctoral thesis, titled The Difference Between the Democritean and Epicurean Philosophy of Nature, in 1841 and submitted it to the University of Jena. He was awarded a Ph.D. in April 1841. In 1844, Marx befriended Friedrich Engels, the German socialist and became a revolutionary communist.
Marx's The Poverty of Philosophy was published in 1847. Marx and Engels published ""The Communist Manifesto"", a political pamphlet summarizing their theories about the nature of society and politics, in 1848. One of the most important political documents of the world, this monumental text is highly influential and continues to remain widely read. The first volume, Capital, Volume I, of his magnum opus Capital (Das Kapital) was published in 1867. Marx continued to work on the remaining two volumes which were published after his death by Engels. Capital, Volume II was published in 1885 and Capital, Volume III in 1894. Considered to be his masterwork, Capital has been translated into all the major languages.