Fortune – Sandro Galea 
In recent years, you may have heard the phrase “the first child to live to 150 has already been born.” It is an exciting thought. Regardless of whether or not it turns out to be true, it is a fact that global average life expectancy has risen dramatically over the last century. According to the World Health Organization, it increased by five years between 2000 and 2015 alone. The United States is no exception to this trend. Last month, the Centers for Disease Control and Prevention reported that, between 2000 and 2014, overall life expectancy in the US increased by two years. This advance is in keeping with prior national life expectancy gains, steadily trending up. In 1900, US life expectancy was about 47 years. It is now close to 79 years. Given this increase, it seems reasonable to expect that our children will live longer lives than we will, lives characterized by significantly greater wellbeing. But is this really the case?.(more)