This dictionary of 17th-century British philosophers construes "philosophy" as wide in scope including not just logic, metaphysics, ethics and epistemology, but those many aspects of religion, politics, mathematics and science that are of philosophical importance. There are entries for over 400 figures: Bacon, Hobbes and Locke, as well asd Digby, Cudworth and Glanvill. But there are also entries on John Lilburne the leveller, Robert Ferguson "the potter" and Thomas Tyron, an early vegetarian. The broad scope also allows inclusion of many figures well known to historians of other disciplines. The "Dictionary" has entries on mathematicians such as Napier and Oughtred, Barrow and Wallis; natural scientists like Hooker and Chillingworth, Baxter and Stillingfleet; writers like Milton and Marvell, Dryden and Defoe. All these figures are of philosophical importance and interest.