- Ethics, Modern--18th century (2)
- Knowledge, Theory of--Early works to 1800 (2)
- Aesthetics, Modern--18th century (1)
- Causation--Early works to 1800 (1)
- Idealism--Early works to 1800 (1)
- Judgment (Logic)--Early works to 1800 (1)
- Liberty--Early works to 1800 (1)
- Political science--Early works to 1800 (1)
- Reason--Early works to 1800 (1)
- Soul--Early works to 1800 (1)
- Teleology--Early works to 1800 (1)
- Toleration--Early works to 1800 (1)