Combining Texts

You have chosen 'works' by Gottlob Frege, 'On the Conservation of Force' by Hermann von Helmholtz and 'New System and Explanation of New System' by Gottfried Leibniz

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All the ideas for Ethics, or select a subheading:
      A. Egoism
      B. Contract Ethics
      C. Virtue Theory
      D. Deontological Ethics
      E. Utilitarianism
      F. Existentialism