Common-sense philosophy is important because it maintains that we can know many things about the world, about ourselves, about morality, and even about things of a metaphysical nature. The tenets of common-sense philosophy, while in some sense obvious and unsurprising, give rise to powerful arguments that can shed light on fundamental philosophical issues, including the perennial problem of scepticism and the emerging challenge of scientism. This Companion offers an exploration of common-sense philosophy in its many forms, tracing its development as a concept and considering the roles it has been assigned to play throughout the history of philosophy. Containing fifteen newly commissioned chapters from leading experts in the history of philosophy, epistemology, the philosophy of science, moral philosophy and metaphysics, the volume will be an essential guide for students and scholars hoping to gain a greater understanding of the value and enduring appeal of common-sense philosophy.