First published in 1917, Theophrastus and the Greek Physiological Psychology Before Aristotle is on the history of ancient Greek physiological psychology.
First published in 1923, Anger presents some considerations of anger where it comes close to conduct and religion.
First published in 1952, Man, Creator or Destroyer makes clear that mankind is preeminent both as a creator and as a destroyer. And we are doomed unless creative man can master destructive man.