" But the order in which these sources will be discussed is not arbitrary. They are listed in descending order of reliability and predictability. For, contrary to almost universal belief, new knowledge – and especially new scientific knowledge – is not the most reliable or most predictable source of successful innovations. For all the visibility, glamour, and importance of science-based innovation, it is actually the least reliable and least predictable one. "

― Peter F. Drucker , Innovation and Entrepreneurship: Practice and Principles