A demographic shift is taking place throughout much of the world. Population aging is changing lives and institutions. Never before have so many people lived to such old age. In the USA, the number of people age 65 and over is projected to leap from about 54 million in 2019 to more than 80 million by 2040. By 2030, all Baby Boomers (1946-1964) will be 65 years of age and older.