"Dimensions of Human Behavior: The Changing Life Course, Fourth Edition", and its companion, cover the content for the social work theories course, titled Human Behavior in the Social Environment. It divides the course content into three primary dimensions: Person, Environment, and Time. This book represents the time component. The Changing Life Course looks at both predictable and unpredictable changes that can impact human behavior across time (the life course). It looks at all the major developmental stages ranging from conception through very late adulthood, and covers life stages that are often overlooked in other texts (such as very late adulthood).