FROM THE FOREWORD by James Birren:

“Gaining understanding of aging is one of the most complex issues facing twenty-first century science. This book addresses the complexity of the factors that interact and influence the course of our longer life expectancy….How we humans grow old is a product of our genetic background as members of a species and our families. But the genome expresses itself in physical and social environments that modulate the appearance of heredity traits. In a sense aging is an ecological problem in which the dynamics are often difficult to explain….This book brings information from the sciences together in a way that is rarely done…..It provides an integration of knowledge about the dynamics of aging and can promote wisdom about how we can modify the life course to our advantage.”