The life expectancy for a 1-year old has gone something along the line of +40%. That's significant but not doubled. Infant mortality is by very large margin the

The life expectancy for a 1-year old has gone something along the line of +40%. That's significant but not doubled. Infant mortality is by very large margin the most important factor in the changes to life expectancy at birth. And you can get most of the way there with just basic hygiene rules. Full on modern medicine only helps with the hedge cases. One interesting data point is that the age at which people transition economically from accumulating wealth to transferring it has remained about the same (around 64), at least as far as Western European inheritance records prior to demographic transition show. Ie. people retire at the same age. They just spend more time being old. I'm not sure it's all that much progress. I wish we found ways of making people useful longer, rather than just trying to keep them from dying.