Yes, but a big progress nevertheless. Life expectancy at 20 was also substantially different to today for males (https://www.ons.gov.uk/peoplepopulationandcomm

Yes, but a big progress nevertheless. Life expectancy at 20 was also substantially different to today for males (https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/lifeexpectancies/articles/howhaslifeexpectancychangedovertime/2015-09-09 https://www.ons.gov.uk/peoplepopulationandcommunity/birthsde..., second graph) However, that is still a world with a lot medicine in there (just take simple things like sutures, inoculations, or setting broken bones). Very difficult to say what life expectancy for adults would have been with zero medicine in the world.