Karl Marx (5 May 1818 – 14 March 1883) was a German philosopher, economist, historian, journalist and communist revolutionary who, with the assistance of his friend Friedrich Engels, enumerated upon the societal trends and laws, refined a materialist conception of history, and developed the framework known as Marxism. He is considered the founder and first classic of Marxism.
Friedrich Engels (28 November 1820 – 5 August 1895) was a German philosopher, theorist, political economist, and communist revolutionary who is considered the co-founder of Marxism. Engels made stupendous contributions to socialist theory. Being a friend of Karl Marx, he often directed his work towards areas such as philosophy while Marx was more dedicated to political economy. He is viewed as a classic of Marxism.