Friedrich Engels (German: [ˈɛŋɡəlz/ /ˈɛŋəlz/; German pronunciation: [ˈfʁi:dʁɪç ˈɛŋəls]) was born on November 28, 1820 in Barmen, Prussia (now Wuppertal, Germany) and died on August 5, 1895. He was a German philosopher and industrialist who is considered the father of Marxist theory, alongside Karl Marx. He worked in industry and sociology, and was a writer, political theorist, and philosopher. He is considered the father of Marxist theory, along with Karl Marx himself. In 1845, he published his book *The Condition of the Working Class in England*, based on his personal observations and research. In 1848, he and Marx published their famous manifesto, known as the Communist Manifesto, or simply the Communist Manifesto. Later, Engels provided financial assistance to Karl Marx in writing his book Capital. After Marx’s death, Engels published the second and third parts of this book. In addition, Engels systematized various conjectures of Karl Marx, resulting in the fourth part of Capital.