Book excerpt: By focusing on key ideas in both criminology and criminal justice, this book brings a new and unique perspective to understanding critical research in criminology and criminal justice -- heretofore, the practice has been to separate criminology and criminal justice. However, given their interconnected nature, this book brings both together cohesively. In going beyond simply identifying and discussing key contributions and their effects by giving students a broader socio-political context for each key idea, this book concretely conceptualizes the key ideas in ways that students will remember and understand.