After the 1848 rebellion mentioned earlier, which was a series of political upheavals throughout a year; it involved workers from France and Spain to as far as Hungary, who went on general strikes, set up provisional governments in some cities and generally shook the continent. It remains the most widespread was of revolutions in European history and occurred all more or less at the same time, with no coordination.
At that point workers began to understand themselves as a socioeconomic class: those who possessed nothing (neither land nor factories) and had to sell their time at work. The 19th century word favored by Marx was "the proletariat." Proletarian is a Latin term used in Imperial Rome to refer to people so poor and uneducated that their principal contribution to Rome was to have children (prole, in Latin) who would then go into the Legions. Socialists argued that the land and factories should be controlled by workers, who were the ones who made these things productive, presumably through a government dedicated to serving workers.
Anarchists went a step further: they argued that the institution of government (along with the concept of property and all religion) was in itself evil and that instead workers should form voluntary associations to organize common ownership of the means of production. The French politician and writer Pierre-Joseph Proudhon is deemed the "father" of Anarchism, although he abandoned it, but the classic Anarchists are Peter Kropotkin, Mikhail Bakunin, Leon Tolstoy and others.
The most notable act of Anarchists in the 19th century was a short-lived rebellion known as the Paris Commune, a revolt during the Franco-Prussian War that led to the collapse of the French Second Empire under Napoleon III (aka Louis Napoleon, a nephew of the original) in September 1870. As Prussia besieged Paris, which was a hotbed of working-class radicalism, workers refused to fight to defend the capitalist-industrialist elite and seized the city from within, proclaimed a "Commune of Paris" led by Anarchists. They were ruthlessly suppressed by the French Army in what was later called "The Bloody Week," beginning May 21, 1871.
However, the ideas of the Commune — voluntarism, no property or religion and even free love — had enormous influence on Marx, who described the event as an example of his fateful phrase, "dictatorship of the proletariat" in his famous work, The Eighteenth Brumaire of Louis Napoleon.