As people get older, issues like physical frailty, cognitive decline, grief, and loneliness can take a serious toll on their mental health. Around the world, it is important for countries to monitor and support the emotional, psychological, and social well-being of their aging populations. New survey research from the Commonwealth Fund, looking at adults age 65 and older in the United States and nine other countries, examines why people do not get the mental health care they need.