I've been reading about the Holocaust and came across a book which made an impression on me - less despair, more uplift.
One of the lessons which can be drawn from the Holocaust may be that if such horrendous evil is possible, amazing good must occasionally happen as well. The book is called Rescuers of Jews during the Holocaust, by Carol Rittner and Sandra Myers, eds. (NYU Press, 1986).
Of particular note: an entire village in France saved thousands. It is called Le Chambon, may it always be remembered for a blessing.
Also a Bavarian army officer called Major Julius Schmahling who saved many people in the Haute Loire. He is linked to the village and helped make their actions possible.