Depends on what you mean by "good chance". This is the mortality curve in England in the half of the 17th century, which was already a fairly modern society; f

Depends on what you mean by "good chance". This is the mortality curve in England in the half of the 17th century, which was already a fairly modern society; for example, not suffering from as frequent famines as in the Early Middle Ages. [0] Out of 1000 people born then, approximately 680 reached 20 years of age and approximately 170 reached 70 years of age. So, 25 per cent of all the adults lived to be 70. Not a "good chance" in my understanding of the word. "Somewhat of a chance", perhaps. [0] https://www.cam.ac.uk/sites/www.cam.ac.uk/files/shorthand/214792/7UHPdymR2R/assets/OMJ2XrCAVU/figure-2-1197x569.jpeg https://www.cam.ac.uk/sites/www.cam.ac.uk/files/shorthand/21...