I do believe in living out your own time, unless it's absolutely impossible, which it is for some people.
A person who has sympathy for mankind in the lump, faith in its future progress, and desire to serve the great cause of this progress, should be called not a humanist, but a humanitarian, and his creed may be designated as humanitarianism.
It was luxuries like air conditioning that brought down the Roman Empire. With air conditioning their windows were shut, they couldn't hear the barbarians coming.