**Violence as a historical method of rupture. Does the radical left differ, according to its chapels, on its analysis of violence? In any case, several common elements can be identified**. From his point of view, violence should not be considered as an act detrimental to a good or a person, but as a necessary dynamic, a mass of energy pushed to its climax, at certain historical moments, in order to allow a break. 1789, 1793, 1848, 1871, 1917… as many successful or unsuccessful ruptures, with positive consequences or not, which have been achieved thanks to and only thanks to violence. Violence is therefore a means which by its political justification escapes morality. This analysis therefore allows the radical left to advocate the use of violence in 2019. [...]