Thomas Nagel (via Jesse Singal):
Whether we succeed or fail in what we try to do nearly always depends to some extent on factors beyond our control. This is true of murder, altruism, revolution, the sacrifice of certain interests for the sake of others — almost any morally important act. What has been done, and what is morally judged, is partly determined by external factors. However jewel-like the good will may be in its own right, there is a morally significant difference between rescuing someone from a burning building and dropping him from a twelfth-story window while trying to rescue him. Similarly, there is a morally significant difference between reckless driving and manslaughter. But whether a reckless driver hits a pedestrian depends on the presence of the pedestrian at the point where he recklessly passes a red light. What we do is also limited by the opportunities and choices with which we are faced, and these are largely determined by factors beyond our control. Someone who was an officer in a concentration camp might have led a quiet and harmless life if the Nazis had never come to power in Germany. And someone who led a quiet and harmless life in Argentina might have become an officer in a concentration camp if he had not left Germany for business reasons in 1930.