A German who escaped just before all the Jews were hoarded into concentration camps in Germany, came to the United States.
His name was Robert Hartman.
His experience with evil uniquely qualified him to set out to deal with the age long question: what is evil, what is good?
He took on himself to define good… the strait and narrow. Many philosophers failed in that: after all the strait and narrow is delineated by the land that encloses it, not by itself…
But he succeeded.