In considering the role of major inventions in history, there have been two major views. This book puts forward one of them. Namely that technological progress can be understood in part by analogy to biological evolution, as a series of continuous and incremental innovations, that arise out of the gestalt of the inventor's environment. The authors argue eloquently, with much cited research to buttress their arguments.
Certainly, most inventions are indeed incremental gains in understanding. But one might say that if you take the evolution analogy, there is also a corresponding hypothesis akin to punctuated equilibrium. Namely that sometimes, an inventor or scientist really does make a fundamental discontinuity in understanding. In a way that a continuously innovative procedure would have been extremely unlikely to garner. In science at least, the best examples may be Einstein's General Relativity, and Claude Shannon's Information Theory. Nothing like either was even remotely contemplated by their contemporaries. Ok, granted, the book talks about technology, not science. But at some fundamental level, the discussion of progress encompasses both.