Not sure what point you're even trying to make here. Life expectancy has been improving due to science and technology improving.

You could starve to death because your crop had been taken by the lords or die hanged to a tree because you complained

That's literally how things work today where western corps exploit the workers in the global south. That's what your lifestyle in the west is built on. Go read up on the coups, death squads, and other atrocities the west regularly commits around the world to keep the system of exploitation going. Here's a good primer for you https://archive.org/details/KillingHope