This comprehensive volume addresses developmental disabilities and intellectual disabilities across the lifespan. Drawing on the expertise of dozens of internationally renowned authors, the book covers the following topics: a historical overview; definitions; current views; approaches to supports, rights, and laws; ethical considerations; early intervention; education; adults/aging; employment; role of families; genetics; common (and uncommon) syndromes; and other specialized topics such as epilepsy, Down syndrome, and autism. The book's goal is to promote the sharing of information, experience, solutions, and insights in order to help improve the quality of life for people with intellectual and developmental disabilities.