You have chosen 'Reply to Fourth Objections' by René Descartes, 'Letters to the Lord Marquis of Newcastle' by Thomas Hobbes and 'Preface to 'Principles of Philosophy'' by Ren Descartes
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 |