This book introduces Unitary Developmental Theory (UDT) to the field of organization development. The second of two volumes, it introduces the UDT model and examines its application to organization development and change management.The book presents UDT comprising seven developmental levels, showing how using its methodical progression can help to avoid issues such as unsustainable growth and change failure while examining how the model improves collaboration, digital transformation, change management and team development. It shows how the model clinically transforms concepts such as culture which is often cited as the cause of failure for change, re-defining it as habituated maturation stage and simplifying culture change accordingly. This book is designed to accompany Volume 1 which details the psychology of the model and its equal applicability to mental-health recovery.Showing how UDT can be used as an overarching model to optimize organization development, this book will be of great interest to researchers, scholars and postgraduate students from the fields of organizational psychology, organization development and change management.