You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'A General Principle to Explain Laws of Nature' by Gottfried Leibniz and 'Intro to Naming,Necessity and Natural Kinds' by Stephen P. Schwartz
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 |