Early Socialist is a term used to describe the ideas of Karl Marx and Friedrich Engels, two German philosophers who wrote extensively about socialism in the 19th century. Marx and Engels are considered to be the founders of modern socialism, and their works have had a profound influence on the development of socialist thought. Marx's most famous work is The Communist Manifesto, which outlines his vision for a classless society based on the principles of collective ownership and economic equality. Engels' most famous work is The Condition of the Working Class in England, which examines the plight of the working class in England during the Industrial Revolution. Together, Marx and Engels laid the foundation for modern socialism and their ideas continue to shape the debate around economic and social justice today.