Life_Expectancy

From William Saletan:

Life expectancy at birth has risen dramatically over the last 200 years. In countries where records have been kept that long, the data indicate that the average lifespan has more than doubled. But these big leaps are due largely to reductions in child mortality and infectious diseases, which can change an individual's lifespan by 50 years or more.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.