C.S. Lewis’s 1943 The Abolition of Man is a set of three essays that encapsulate some of the most important elements of good critical thinking. Lewis considers a weighty topic, moral philosophy – and more precisely how we teach it, and where morality comes from. As critics and enthusiasts for Lewis’s work alike have noted, though, he was not a philosopher as such, but a professor of literature. And rather than presenting novel or original ideas, the essays’ true qualities lie in the ways in which they evaluate and judge the arguments of prior philosophers, and how they construct a...

Ferdinand de Saussure's Course in General Linguistics is one of the most influential texts of the 20th-century - an astonishing feat for what is, at heart, a series of deeply technical lectures about the structure of human languages. What the Course's vast influence shows, fundamentally, is the power of good interpretative skills. The interpretative tasks of laying down and clarifying definitions are often vital to providing the logical framework for all kinds of critical thinking - whether it be solving problems in business, or esoteric academic research. At the time sat which Saussure...