This volume of Midwest Studies focuses on the currently hot topic in ethics and action theory of shared intentions and relates it to issues in collective responsibility. Each of the essays in the volume is by an internationally known scholar who has published seminal pieces on various aspects of the concepts of shared intention and collective responsibility. These are all new essays that expand the discussion of those concepts and invite those interested in the topic to examine a variety of ways for understanding the basic idea and the application of the notion of shared intention to a range of contemporary issues in the ethics of responsibility.