From Citizendium, the Citizens' Compendium
- Born of middle-class Jewish parents in the Prussian city of Trier.
- Attends Trier High School.
- Enrols in the University of Berlin, reading law, history and philosophy.
- Becomes a Hegelian idealist.
- Graduates with a doctorate in philosophy.
- Marries Jenny von Westphalen.
- Moves to Paris.
- Writes Critique of Hegel’s Philosophy of Right "Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people."
- Birth of daughter, Jenny.
- Meets Friedrich Engels author of "The Conditions of the Working Class in England".
- Writes The Paris Manuscripts,
- Is expelled from France and moves to Brussels.
- Writes Theses on Feuerbach
- Sets up the Communist Correspondence Committee (with Engels).
- Lectures to the German Workers' Society
- Launch of the Communist League (formerly the "League of the Just") with the motto "Workers of the World Unite!"
- Writes The Poverty of Philosophy.
- French revolution of 1848 
- Returns to France.
- Starts writing political pamphlets on The class struggles in France "there appeared the bold slogan of revolutionary struggle: Overthrow of the bourgeoisie! Dictatorship of the Working class!."
- Publishes the Communist Manifesto (written jointly with Engels) that starts with "A spectre is haunting Europe—the spectre of Communism", and ends with "Workers of the World Unite!".
- Moves to Cologne. Writes articles in the "Neue Rheinische Zeitung" Moves to London.
- Writes (with Engels) the Address to the Communist League "Their battle-cry must be: The Permanent Revolution!".
- Writes The Eighteenth Brumaire of Louis Bonaparte.
- Supports the launch of the International Workingmen’s Association (the first International)
- Completes "Grundisse" Outlines of the Critique of Political Economy, 
- Publication of Das Kapital
- Writes A Contribution to the Critique of Political Economy.
- Attends The Hague Congress of the First International,
- Writes Critique of the Gotha Programme, in which he coins the slogan "from each according to his ability, to each according to his need".
- His wife dies.
- Death and burial in London's Highgate Cemetery.