Combining Texts

You have chosen 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz, 'Papers of 1906' by Bertrand Russell and 'Letters to Hugo Boxel' by Baruch de Spinoza

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All the ideas for Action, or select a subheading:
      A. Definition of Action
      B. Preliminaries of Action
      C. Motives for Action