Jack of Harts

In some ways, growing organ banks full of replacement organs unlocked immortality for us.  Oh, we could die of disease or accidents, but healthy livers can filter out a lot of trash.  And a healthy heart usually doesn’t stop beating one morning without warning.  The remaining kings and queens of Europe were the first to do this, long before the procedures went public.  Why do you think they reigned so long?  They’re the reason for modern royal term limits.