This pioneering book offers a bold, psychologically informed take on leadership for today’s complex and evolving systems. Written for clinical, counselling, and health psychologists, it challenges traditional models and reframes leadership as a dynamic, adaptive, and systems-aware practice. With a distinctive triadic lens—looking within, between, and across systems—it integrates psychological theory, organisational insight, and systems thinking to explore how identity, emotion, power, and context shape leadership and followership in real-world environments. It offers practical tools to navigate relational challenges, manage work pressures, foster psychological safety, and lead with purpose through conflict, change, and uncertainty. Grounded in lived experience and learning-in-action, this book shows how leadership is co-created—through reflective and reflexive practice, inclusive collaboration, and ethical influence. It argues that sustainable, transformational change requires strategic focus, courageous engagement with power dynamics, and support for leadership at all levels. Essential reading not only for psychologists, managers, and aspiring leaders, but for anyone interested in creating healthier, more equitable workplaces and leading with courage, compassion, and systemic insight.