Friedrich Engels was a German philosopher, social scientist, and political theorist, born on November 28, 1820. He is best known for his collaboration with Karl Marx, with whom he co-authored several influential works, including the Communist Manifesto in 1848. Engels played a crucial role in developing the theory of Marxism, which critiques capitalism and advocates for a classless society. In addition to his work with Marx, Engels wrote extensively on various topics, including economics, history, and social issues. His book, The Condition of the Working Class in England, published in 1845, highlighted the struggles faced by workers during the Industrial Revolution. Engels' ideas have had a lasting impact on political thought and movements worldwide.