I have been accused of being ignorant of economics (although I am the founder and Chairman of the Board of a company which publishes seven professional economic newsletters), of being ignorant of sociology (although I am trained in sociology and was C. Wright Mills' research assistant at Columbia), of being unable to use statistics (although I earned my living as a professional statistician for five years) and of ignoring political factors (although all my graduate training was in political science).

Ch. 2 - Foundations of Psychohistory (1982)