The doctor hoped to make the world a better place.

However, he could sense his own limitation.

Even though he abandoned his own country... and won the war, the world did not become better, not even a little bit.

The law remains unchanged, the survivors of the concentration camps are freed, only to be re-arrested again after the war...

"Wisdom and Effort" Manchester city's motto

Even if you can change the world, you can't change the society. That is just human nature.

You can replace a man, but you can't change society, is it?