"The pursuit of a sustainable advantage has long been the focus of strategy. But advantages last only until competitors have duplicated or outmaneuvered them. ... protecting advantages has become increasingly difficult. Once the advantage is copied or overcome, it is no longer an advantage. It is now a cost of doing business. Ultimately the innovator will only be able to exploit its advantage for a limited period of time before its competitors launch a counterattack. With the launch of this counterattack, the original advantage begins to erode, and a new initiative is needed.