Great article by Neal Stephenson called Space Stasis or “What the strange persistence of rockets can teach us about innovation.”
I highly recommend this article by the Sci Fi writer.
“To employ a commonly used metaphor, our current proficiency in rocket-building is the result of a hill-climbing approach; we started at one place on the technological landscape—which must be considered a random pick, given that it was chosen for dubious reasons by a maniac—and climbed the hill from there, looking for small steps that could be taken to increase the size and efficiency of the device. Sixty years and a couple of trillion dollars later, we have reached a place that is infinitesimally close to the top of that hill. Rockets are as close to perfect as they’re ever going to get.” – Slate (http://www.slate.com/id/2283469)
Link to the article on SLATE