Encarta Encyclopedia 2003 identifies two schools of anarchism:
- The "philosophic" system, attributed to Pierre Joseph Proudhon, which
would exclude authority from society by non-violent means. This system
espouses the view of a gradual evolution of society towards anarchy and
generally does not advocate organized action, but rather extreme
- The Bakunin system, attributed to a group led by Mikhail Bakunin.
This group was expelled in 1872 from the First International. This
system advocates organized action and, if deemed necessary by the group,
violent means to achieve anarchy.