Illegalism
Illegalism is an anarchist philosophy that developed primarily in France, Italy, Belgium, and Switzerland during the early 1900s as an outgrowth of individualist anarchism. The illegalists openly embraced criminality as a lifestyle.
Emergence
Illegalism first rose to prominence among a generation of Europeans inspired by the unrest of the 1890s, during which Ravachol, Émile Henry, Auguste Vaillant, and Caserio committed daring crimes in the name of anarchism, in what is known as propaganda of the deed.
Influenced by theorist Max Stirner's egoism, the illegalists in France broke from anarchists like Clément Duval and Marius Jacob who justified theft with a theory of la reprise individuelle (Eng: individual reclamation). Instead, the illegalists argued that their actions required no moral basis - illegal acts were taken not in the name of a higher ideal, but in pursuit of one's own desires. "In Paris, this milieu was centred on the weekly paper, L’Anarchie and the Causeries Populaires (regular discussion groups meeting in several
different locations in and around the capital each week), both of which were founded by Albert Libertad and his associates".