India, Nov. 8 -- Much has been written about India's demographic dividend - the great advantage of having the world's largest working-age population. Yet, while this dividend is often seen as the country's greatest economic strength, an equally powerful but less discussed demographic gain lies ahead. This new dividend stems from another profound transformation: the steady rise in longevity and healthspan. Over the last fifty years, life expectancy in India has climbed from about fifty years in 1970 to more than seventy today. Increasingly, people are living into their eighties and nineties, and centenarians are no longer rare. But this phenomenon is not merely about adding years to life - it is about adding purpose, vitality, and engageme...