“This unwillingness, or inability, of the experts to accept demographic realities which do not conform to what they take for granted gives the entrepreneur his opportunity. The lead times are known. The events themselves have already happened. But no one accepts them as reality, let alone as opportunity. Those who defy the conventional wisdom and accept the facts – indeed, those who go actively looking for them – can therefore expect to be left alone for quite a long time. The competitors will accept demographic reality, as a rule, only when it is already about to be replaced by a new demographic change and a new demographic reality.” Peter Drucker, Innovation and Entrepreneurship
Souvenirs 