This book opens up a critical dialogue within and across the theoretical traditions of critical psychology and cultural-historical psychology. It explores and addresses fundamental issues and problems within both traditions, with a view to identifying new avenues for productive discussion and cooperation between these two important movements in contemporary psychology. Accordingly, the book gathers contributions from a range of internationally respected researchers from both fields who have demonstrated a willingness to look critically, and self-critically, at their theoretical allegiances and trajectories. This book provides readers with the opportunity to both appreciate and reflect on fundamental differences of perspective across the 'cultural-historical'/-critical' psychology divide and, thereby, to consider and debate key issues facing the discipline of psychology more generally.