I'm assuming the Magical Device recalibrates regularly - so if there are major medical advances, the Device will adjust the age limit to what the new average life expectancy would be. (It's MAGIC. It can just work this out as a simulation and make the necessary modifications.)
So if we come up with enough medical progress so that people live, on average, to 200, then, hey! That's what we all live to.
And if we do the worldwide version, and do something about the diseases and so on in the countries with really low expectancies, our own lives will revise upward.
But if there's a war, that's gonna knock some time off everyone's life, not just the people fighting it.
no subject
So if we come up with enough medical progress so that people live, on average, to 200, then, hey! That's what we all live to.
And if we do the worldwide version, and do something about the diseases and so on in the countries with really low expectancies, our own lives will revise upward.
But if there's a war, that's gonna knock some time off everyone's life, not just the people fighting it.
And so on.