However Often

any leader 'saves the world',
or even saves his own country,
from some powerful alliance,
s/he will only do it the once.

After that the best s/he can do is resign.,
and some time later write their memoirs
to remind the public of who they used to be.

In their political afterlife
they will be politely received,
and may even speak
with wisdom and truth,
but their words will be doomed
to be ignored as their old mistakes
are repeatedly pointed out to them.