In the thirty years since its first publication, Andy Hargreaves' seminal book has established itself at the forefront of thinking on teachers' work and culture. Now, faced with a global crisis in recruitment and retention and building on a wealth of new research, he returns for a second edition to confront the challenges facing today's teachers. Drawing on the experiences of teachers at all levels, he sets out a comprehensive manifesto for every aspect of teaching, from wellbeing and collaboration to innovation and professional capital. Hargreaves makes the case for strategies that improve the lives, work and impact of teachers by forging connections, leading change, empowering individuals and fostering confident, long-term strategies. Both provocative, prescient, and practical, this is a roadmap for twenty first century teachers, for those who work with them, and for researchers who want to understand teaching better in the postmodern age.