You have chosen 'works (fragments)' by Xenocrates, 'Groundwork of the Metaphysic of Morals' by Immanuel Kant and 'Toward a Philosophy of History' by Jos Ortega y Gassett
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 |