The heritability of traits increases as the environment improves. For example historically height wasn't very heritable, it depended mostly on environment, whic

The heritability of traits increases as the environment improves. For example historically height wasn't very heritable, it depended mostly on environment, which is to say nutrition. Now in countries where adequate nutrition is widely available, height is much more heritable. Could the same effect apply to longevity? I don't really know, because I don't even know what environmental factors improve longevity, except for the grossly obvious ones.