I recently returned from a trip to Poland, and was impressed with two ideas. First, one small Polish town, Markova, there were so many Righteous Gentiles that the town built a museum dedicated to the residents of that town who had the moral courage to save Jews, at risk of their own lives. An amazing museum, and very inspiring to see all the people who had the courage to save Jewish lives, when risking their own lives.
The second thought that came to me was that American pilots who flew over Auschwitz were told not to bomb the railways to the crematorium. What if some of them took it upon themselves, despite orders to the contrary, to bomb the railways? How many Jewish lives might have been saved!! Indeed moral courage can be found in many different situations.