From The Social Interpretation of History by Maurice William
Differences within the Second International are as old as the International itself. This is far from an original discovery. Socialist forums have echoed the opposing views of the master minds the world over. these differences have been responsible for a very large proportion of Socialist literature. Yet the problems are still with us with little hope of solution.There have been instances where the theoretical principles which form the basis for Socialist activity have been brought into question, usually by narrowing their scope through exceptions and limitations.1 But the main ground for heated discussion has been policy and and tactics . . .
1 (Conspicuous among those who have undertaken this task is Edward Bernstein.)New York : Sotery, 1921, page 1.