The current issue of the Pearson Papers focuses on the theme: "Measures of Effectiveness: Peace Operations and Beyond." Within this issue, you will find diverse approaches to measurement and even differing conceptualizations of what peace operations today consist of, including those that go 'beyond' the traditional notion of peacekeeping. It is hoped that this issue provides a valuable compendium on the topic and acts as a stimulant for further discussion and debate beyond the bounds of this publication.