 In his book, "Is War Necessary for Economic Growth?," available in short form through the lecture of the same title Professor Ruttan argues that large scale and long term government investment is necessary for the development of general purpose technologies and economic growth.He analyzed the development of six different technology complexes and concluded that government investments have been important in speeding up the development of all of these, and that nuclear power would, most probably, not have been developed at all in the absence of large government investments in development.The six technologies that were analyzed by Ruttan are