Philosophy of development is an area of research at the intersection of philosophy, psychology, and education. This text combines a broad sketch of contemporary developmental theory with detailed discussions of its central issues, in order to construct a general framework for understanding and analyzing theories of individual and collective development in various domains ranging from cognitive and moral development to developments in art. Atten tion is also given to the relations between conceptual development and education. The approach taken in this volume is located in the landscape of current philosophical debate. This text is not about just one type of development, such as moral development or scientific development, but focuses on the central philosophical and metatheoretical problems underlying almost all theories of conceptual development.