This comprehensive anthology collects twenty original essays and critical commentaries on different aspects of contextualism, written by leading philosophers on the topic. The editors' introduction sketches the historical development of the contextualist movement and provides a survey and analysis of its arguments and major positions. The papers explore, inter alia, the central problems and prospects of semantic (or conversational) contextualism and its main alternative approaches such as inferential (or issue) contextualism, epistemic contextualism, and virtue contextualism. They also investigate the connections between contextualism and epistemic particularism, and between contextualism and stability accounts of knowledge.