It was at this point — the necessity of striking down monopoly — that came the parting of their ways. Here the road forked. They found that they must turn either to the right or to the left, — follow either the path of Authority or the path of Liberty. Marx went one way; Warren and Proudhon the other. Thus were born State Socialism and Anarchism.
¶ 10 - State Socialism and Anarchism: How Far They Agree, and Wherin They Differ (1888)