
"Federalism, Socialism, Anti-Theologism" http://www.marxists.org/reference/archive/bakunin/works/various/reasons-of-state.htm, presented by Bakunin as a Reasoned Proposal to the Central Committee of the League for Peace and Freedom, at the League's first congress held in Geneva (September 1867).
Variant translation: We are convinced that freedom without Socialism is privilege and injustice, and that Socialism without freedom is slavery and brutality.
As quoted in The Political Philosophy of Bakunin: Scientific Anarchism (1953) edited by Grigoriĭ Petrovich Maksimov, p. 269