Throughout history, social and intellectual crises have given rise to compelling suggestions for reform steeped in various progressive sensibilities. For example, within the discipline of criminology -- particularly during the 1980's and 1990's -- a number of unconventional theoretical perspectives emerged that sought to challenge many of the assumptions embedded within its own mainstream discourse, and to propose alternative solutions for meaningful, sustainable change. Conceived of as "critical" in overarching orientation, these efforts to rethink the foundations of criminological verstehen can be traced to several specific theoretical and methodological strands of inquiry (e.g., anarchism, peacemaking, chaos theory, postmodernism). Though distinct in some respects, these emerging models are linked paradigmatically by their shared discontent with conventional criminological thought and by their radicalized posture toward existing and previously unexamined epistemic crises. Collectively, this is an agenda for reform that seeks to establish a more humane and just social order, particularly as citizens and society confront the institutional and communal problems posed by crime, delinquency, and deviance.