Full Idea
The crucial contribution to political theory made by anarchists is the realisation that freedom and equality are in the end the same thing.
Gist of Idea
Anarchists show that freedom and equality are essentially the same
Source
Nicolas Walter (About Anarchism [1969], p.03)
A Reaction
They can't be the same thing, but they may be inseparable. Two slaves can be equal, and two unequal people (in wealth, say) can be very free (in separate countries). But local inequality seems to restrict someone's freedom.
Book Reference
Walter,Nicolas: 'About Anarchism' [Freedom Press 1977], p.3