"In most respects the intelligence calling has come of age. What has happened to it in the last fourteen years is extraordinary. Maybe our present high is not so extraordinary as our low of 1941. In that day the totality of government's intelligence resources was trifling. We knew almost nothing about the tens of thousands of things we were going to have to learn about in a hurry. As emergencies developed we found ourselves all too reliant upon British intelligence. Many of us recall important studies issued by US intelligence organizations which were little more than verbatim transcripts of the British ISIS reports. In 1941, the number of people who had had prior intelligence experience and who at the same time were available for new government assignments intelligence was very small. There were few in Washington who could give any guidance as to how to go about the business in hand. What intelligence techniques there were, ready and available, were in their infancy. Intelligence was to us at that period really nothing in itself; it was, at best, the some of what we, from our outside experience, could contribute to a job to be done. It did not have attributes of a profession or a discipline or a calling. Today things are quite different."
Center for the Study of Intelligence: https://www.cia.gov/library/center-for-the-study-of-intelligence/index.html
Studies in Intelligence (Fall 2000)