Understanding Human Development 3rd edition introduces the reader to some of the core theoretical understandings of human development and behaviour, relevant to social work and human services students. It draws from the vast body of research and literature, as well as from the research and literature from more adversity-focused areas of trauma and loss. This book advocates a multidimensional approach to understanding the complexities of human behaviour and development across the lifespan; that is, an approach that simultaneously considers the realities of people's inner and outer worlds.