You have chosen 'Nature and Observability of Causal Relations' by Curt Ducasse, 'Letters to Wolff' by Gottfried Leibniz and 'On the Nature of Moral Values' by Willard Quine
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| A. | Basis of a State | |
| B. | Nature of a State | |
| C. | Ruling a State | |
| D. | Ideologies |