Life expectancy in America has doubled since 1776 thanks to vaccines, sanitation, clean water and antibiotics. Modern challenges include obesity, the opioid epidemic and COVID-19.
Americans today live roughly twice as long, on average, as they did when the Declaration of Independence was signed.
When the nation was founded in 1776, life expectancy was around 35 to 40 years old, historians estimate. However, someone who survive... [6721 chars]