Data on the life expectancy of aristocrats in England has fascinated researchers for years. Before the 1700s, dukes and their families had about the same life expectancy as average Brits. So there was no gap in longevity between the rich and the rest of the population.
Then, over the next 100 years, this changed dramatically — and the rich began to pull away from the poor in terms of health.
The professional army.
Before about 1700 aristos were those who led everyone into battle, after, not so much.
And battle does have certain lifespan shortening attributes to it…..