This seems like it could be true, but is against my intuition. It could be that in 1900 things that killed people killed them before brain activity was signific

This seems like it could be true, but is against my intuition. It could be that in 1900 things that killed people killed them before brain activity was significant to have an effect. But as health results improved, brain activity ended up being a bigger factor on when someone died because they weren't busy dying from typhoid 25 years prior. I'm personally of the hypothesis that in most cultures men undertake activities that end up killing them earlier in aggregate than women.