This book is an achievement on several fronts. Firstly, it represents an impressive fusion of theoretical subtlety and sophisticated quantitative research methods. This happens far too rarely in the policy research world that I inhabit. Secondly, the conceptual lens through which it examines the reforms to the Chilean criminal justice system is one that provides—to my mind—exactly the right focus that is needed when assessing the performance of any justice system. And thirdly, it generates some real insights into the impact of one important governmental reform process. In this foreword, I shall discuss briefly these three themes.