The fact that he didnt get credit for a while is more the story of social injustice. But his own spirit wasnt driven by that, and wasnt dependent upon that. He just wished he had the cash to go to medical school. – Mary Stuart Masterson

Another cause of change, one less noticeable but fundamental, is the modern growth of population closely connected with scientific and medical discoveries. It is interesting that the United Nations has set up a special Commission to study this question. – Emily Greene Balch