That sounds about right. Though George Washington was probably about average age for his time. I did some back of envelope math once which came to about 10 ye

That sounds about right. Though George Washington was probably about average age for his time. I did some back of envelope math once which came to about 10 years. That is to say, absent wars and famines, through most of human history, if you made it to the age of ten, you had about equal odds to making it to 70. Today it's about 80. Among the very long-lived in my own family, until the end and final decline, they have often never been seriously sick and have never had any major medical care in their adult lives. Such good luck seems to have also been known to happen to the ancients, if perhaps slightly less often.