Combining Texts

You have chosen 'Space, Time and Deity (2 vols)' by Samuel Alexander, 'Letters to Oldenburg' by Baruch de Spinoza and 'Essence and Accident' by Irving M. Copi

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature