Never ever. The two world wars artificially lowered life expectancy, so everything that comes after seems to be better, but does not need to be better. Furtherm

Never ever. The two world wars artificially lowered life expectancy, so everything that comes after seems to be better, but does not need to be better. Furthermore, the world wars cherry-picked the genetically fittest, so a few generations will profit, but the effect will level out. Than it is very clear, that genetically influenced body size correlates negatively with LE. And people are getting bigger every generation. Furthermore, the decline of infant mortality will level out. The effects of the decadent life style and the question of meaningfulness of LE vs health span have already be mentioned by other commenters. To come to an end, LE is a rather stupid single value estimator of the rather complex mortality graph.