 Another theme that needs stressing is Strawson’s engagement with the history of philosophy. His work on Kant in The Bounds of Sense and in other articles is perhaps the most straightforward example of this engagement, but it is not the only instance. In Individuals and elsewhere he wrote about Descartes, especially his account of the self. Leibniz is the hero, or perhaps anti-hero, of chapter 4 of Individuals. Hume and Wittgenstein are the central characters in Skepticism and Naturalism, and he wrote about Spinoza, especially his theory of freedom. From the last century, he wrote about Wittgenstein, in a famous review of the Philosophical Investigations, published in Mind (reprinted in Strawson 2011), and also G.E. Moore. These writings reveal both a deep knowledge and a deep understanding of these thinkers, never unsympathetic and always able to see the wood as well as the trees. Strawson had a sense of the age of philosophical problems, and of the insights from the great dead philosophers that need preserving and renewing.