1. Engels to Bloch, 9-21-90, SC, p. 417. [BACK]

2. Engels, Ludwig Feuerbach and the End of Classical German Philosophy , MEW 21, p. 298; SW III, pp. 365-S66. [BACK]

3. Engels, Herr Eugen Dühring's Revolution in Science [Anti-Dühring] , MEW 20, p. 265; A, p. S10.

4. Ibid., MEW 20, pp. 12, 22, 129; A, pp. 17, 29, 152. [BACK]

3. Engels, Herr Eugen Dühring's Revolution in Science [Anti-Dühring] , MEW 20, p. 265; A, p. S10.

4. Ibid., MEW 20, pp. 12, 22, 129; A, pp. 17, 29, 152. [BACK]

5. Engels, Anti-Dühring , MEW 20, pp. 55, 131-132; A, pp. 68, 155. [BACK]

6. Engels, Dialectics of Nature , MEW 20, p. 475; DN. p. 153. [BACK]

7. Engels, Ludwig Feuerbach , MEW 21, p. 270; SW III, p. 339. [BACK]

8. See Engels, "Speech at the Graveside of Karl Marx," SW III, p. 162. [BACK]

9. See, e.g., Engels, The Origin of the Family, Private Property and the State , SW III, p. 201. [BACK]

10. See Engels, Dialectics , MEW 20, p. 500; DN, pp. 234-235.

11. Ibid., p. 466; DN, p. 187.

12. Ibid., p. 469.

13. Ibid., p. 325. [BACK]

10. See Engels, Dialectics , MEW 20, p. 500; DN, pp. 234-235.

11. Ibid., p. 466; DN, p. 187.

12. Ibid., p. 469.

13. Ibid., p. 325. [BACK]

10. See Engels, Dialectics , MEW 20, p. 500; DN, pp. 234-235.

11. Ibid., p. 466; DN, p. 187.

12. Ibid., p. 469.

13. Ibid., p. 325. [BACK]

10. See Engels, Dialectics , MEW 20, p. 500; DN, pp. 234-235.

11. Ibid., p. 466; DN, p. 187.

12. Ibid., p. 469.

13. Ibid., p. 325. [BACK]

14. Marx, Economic and Philosophic , MEGA I, 3, p. 123; CW 3, p. 304. See also ibid., p. 170; CW 3, p. 345: "Nature fixed in isolation from man—is nothing for man." [BACK]

15. Marx and Engels, German Ideology , MEGA I, 5, p. 554; CW 5, p. 28. [BACK]

16. Engels, Ludwig Feuerbach , MEW 21, p. 300; SW III. pp. 369-370. [BACK]

17. Engels, Dialectics , MEW 20, p. 466; DN, p. 187. [BACK]

18. See Marx, Economic and Philosophic , MEGA I. 3, pp. 122-123; CW 3, pp. 302-303; and Marx and Engels, German Ideology , MEGA I, 5, pp. 32-33; CW 5, pp. 38-39. Marx did say in the 1844 manuscripts that sense perception must be the basis of all science; but he later revised this view, in coming to hold the position that no accurate science could be attained continue

without reference to human practice—the point at which Marx conceded to classical idealism its moment of truth. [BACK]

19. Engels, "Special Introduction to the English Edition of 1892 of Socialism: Scientific and Utopian ," SW III, p. 101. [BACK]

20. Engels, Dialectics , MEW 20, p. 497; DN, p. 23O. Marx, Grundrisse , GK, p. 505; G, p. 611. [BACK]

21. Engels, Ludwig Feuerbach , MEW 21, p. 276; SW III, p. 347. [BACK]

22. Engels, Anti-Dühring , MEW 20, pp. 260, 262; A, pp. 304-305, 307. [BACK]

23. Engels, Dialectics , MEW 20, p. 324; DN, pp. 19-20. [BACK]

24. Engels, Anti-Dühring , MEW 20, p. 106; A, p. 125, where Engels also claims that "freedom of the will therefore means nothing but the capacity to make decisions with real knowledge of the subject." [BACK]

25. Marx, Capital , MEW 25, p. 828; C III, p. 820. [BACK]

26. Engels, Anti-Duhring , MEW 20, p. 250; A, p. 293.

27. Ibid., p. 249; A, p. 292.

28. Ibid., p. 250; A, p. 293; and Engels, Socialism: Scientific and Utopian , SW III, p. 151. [BACK]

26. Engels, Anti-Duhring , MEW 20, p. 250; A, p. 293.

27. Ibid., p. 249; A, p. 292.

28. Ibid., p. 250; A, p. 293; and Engels, Socialism: Scientific and Utopian , SW III, p. 151. [BACK]

26. Engels, Anti-Duhring , MEW 20, p. 250; A, p. 293.

27. Ibid., p. 249; A, p. 292.

28. Ibid., p. 250; A, p. 293; and Engels, Socialism: Scientific and Utopian , SW III, p. 151. [BACK]

29. Engels to Zasulich, 4-23-85, SC, p. 384. [BACK]

30. Engels, Ludwig Feuerbach , MEW 21, p. 307; SW III, p. 376. [BACK]