[A]lthough knowledge itself is not a competitive good, some of the necessary conditions for acquiring and exercising intellectual powers plainly are competitive. Philosophers and scientists and artists need as much food, clothing, shelter, and warmth as anyone else. And they need considerably more leisure, and a long and expensive training. Now the supply of all these things is limited. Unless some people mainly devote themselves to producing such things, and thereby forfeit their own chance of any great intellectual or artistic development, it is certain that scientists and philosophers will not have the leisure or the training or the freedom from practical worries which are essential to their intellectual development and activity.
(C. D. Broad, Five Types of Ethical Theory [London and Henley: Routledge & Kegan Paul, 1930], 43)
Keith Burgess-Jackson, J.D., Ph.D. 