You have chosen 'On Liberty' by John Stuart Mill, 'The Idea of the Brain' by Matthew Cobb and 'Letters to Coste' by Gottfried Leibniz
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 |