The document summarizes key topics from Chapter 1 of the textbook "Gerontological Nursing" including demographics of aging populations, leading causes of death and disability, theories of aging, and healthy aging. It discusses how the population over age 60 is projected to double globally in the next 50 years. Common causes of death among older adults are heart disease, cancer, stroke and chronic lung/kidney disease. Theories of aging include biological, psychological, and sociological perspectives.