The aspects of Bertrand Russell’s views on philosophy cover the changing viewpoints of philosopher and mathematician Bertrand Russell (1872–1970), from his early writings in 1896 until his death in February 1970. Russell’s account anticipates many of the insights to be found in the recent critical thinking literature, and his views on critical thinking are of enormous importance in understanding the nature of educational aims. Moreover, it is argued that Russell manages to avoid many of the objections which have been raised against recent accounts. With respect to impartiality, thinking for oneself, the importance of feelings and relational skills, the connection with action, and the problem of generalizability, Russell shows a deep understanding of problems and issues which have been at the forefront of recent debate. Russell’s epistemology went through many phases. Once he shed neo-Hegelianism in his early years, Russell remained a philosophical realist for the remainder of his life, believing that our direct experiences have primacy in the acquisition of knowledge. While some of his views have lost favour, his influence remains strong in the distinction between two ways in which we can be familiar with objects: “knowledge by acquaintance” and “knowledge by description”. Russell is generally credited with being one of the founders of analytic philosophy, and he also produced a body of work that covers logic, the philosophy of mathematics, metaphysics, ethics and epistemology. The ideal of critical thinking is a central one in Russell’s philosophy, though this is not yet generally recognized in the literature on critical thinking. For Russell, the ideal is embedded in the fabric of philosophy, science, liberalism and rationality, and this book reconstructs Russell’s account, which is scattered throughout numerous papers and books.