Civilizations may be likened to mountain ranges, rising through aeons of geologic time, only to have the forces of erosion slowly but ineluctably nibble them down to the level of their surrounding. Within the far shorter time span of human history, civilizations, too, are liable to erosion as the special constellation of circumstances which provoked their rise passes away, while neighboring people lift themselves to new cultural heights by borrowing from or otherwise reacting to the civilized achievement.
McNeill, The Rise of the West
I find McNeill’s thought very universal. It can be effectively applied to a company’s growth in a competitive market. Market leaders need to realize that “circumstances” which provoke their rise are destined to pass away. Competitors will sooner or later, by either “borrowing” or “reacting”, nullify that advantage. There can be no stronger case against complacency. Continuous innovation and improvement is an eternal truth. Accept it or quit the game.