All we can thus far say about the duration of the units of [the business cycle] and each of [its] two phases is that it will depend on the nature of the particular innovations that carry a cycle,... and the financial conditions and habits prevailing in the business community in each case.
Joseph A. SchumpeterThe state has been living on a revenue which was being produced in the private sphere for private purposes and had to be deflected from these purposes by political force. The theory that construes taxes on the analogy of club dues or of the purchase of the services of, say, a doctor only proves how far removed this part of the social sciences is from scientific habits of mind.
Joseph A. Schumpeter