This book of original papers offers fresh approaches to skepticism–a topic in philosophy with a noble two-millennia history; and one that even inaugurated modern philosophy in Descartes’s Meditations. Particularly with the rise of scientific forms or models of philosophy, skepticism today is often treated as a dead-end not worthy of serious reflection. In contrast to this prevailing attitude, the skepticisms discussed in these pages are alive. Here are assembled leading thinkers who claim at least some forms of skepticism to be true (e.g. skepticism about ethics or metaphysics) or insightful enough to be a lasting source of philosophical enlightenment and inspiration.