You have chosen 'The Methods of Ethics (7th edn)' by Henry Sidgwick, 'Natural Kinds' by Willard Quine and 'Causation and the Manifestation of Powers' by Alexander Bird
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Natural Theory, or select a subheading: |
| A. | Speculations on Nature | |
| B. | Natural Kinds | |
| C. | Causation | |
| D. | Laws of Nature |