I think it has more to do with 'stability' than any particular form of civilizational structure.
Current anthro/archeologists have theorized that we grew from a revisiting/rediscovery of inventions/ideas that the greeks/romans had already either assimalated or invented but were lost because of economic/political falls and the fire at the Libarary of Alexandria. Beyond the Renaissance's influence on art/philosophy/religion (Enlightenment already mentioned).
I don't remember the inventors name, but there are those who theorize that Greeks, while under Roman rule, were responsible for some pretty 'modern' creations including a steam enging. It never really made it beyond an entertaining bauble from what we know now. Theorists say that this and other inventions weren't really explored for 'modernizing' their world because slave labor was so plentiful, who needed to fix what wasn't broken. Labor was cheap and easy to get and replace; and life was already really good for the 'powers that be' and they didn't have that fire in the belly to get more, they were enjoying what they had...until they fell: Greeks, Romans....
In contrast, I would say that the series of Plagues that reduced the population through Europe and the British Isles was more a factor than the particular type of government. The peasant class went from being 'cheap labor' and were essentially slaves in all ways except name to a hot commodity because the logisitical and agricultural work still needed to be done by someone to support the feudal manor as a market, but now the Nobles/land owners had to 'deal' with the peasants to entice them to stay where they were or lure them to the Noble's manor. THis lead to educational opportunities for more 'common' people, more political clout, and the immergence of a tradesman 'middle class' of common people. When you have more more educated and influencial minds in the mix, you will increase the odds of good ideas being created and also implemented.
To summarize in the capitolistic propaganda of our fathers, "necessity was the mother of invention" in both structure and social change as well as actual inventions/innovations of how business was done.
A modern example of this is H. Ford. Everyone knows that he is known as the father of the automobile industry but the emphasis should be on INDUSTRY and not Automobile. He wasn't the only car maker/innovator but he was the one who could make it faster, cheaper and promote it better than the other guy. Feudal manors were trying to do the same thing within their open air markets. If they could get peasant types to 'invent' agricultural/trade ideas that would make their produce and products better, easier/faster to make AND get to market - they win and the other nobles loose. Some nobles kept people around through intimidation, but generally the nobles who rewarded commoners who improve the market power of their manor kept the cream of the crop so to speak.
I would say that current 'modernization' would be more easily correlated to nations - which were really stabilized or 'nationalized' well after feudalistic practices. Feudalism was too unstable and created too much 'in fighting' for much innovation to occur - though there were some advances in agriculture from what I remember. That is why it has been termed the 'Dark Ages' and not just called the Medieval period.
Can't say that I know much about the eastern growth beyond the fact that Japan had to be bullied into the modern age, but then grabbed it by the throat and ran with it. China industrialized, IMO for similiar reasons but instead of American Capitolism it was the Chinese 'cultural revolution' that drove that particular change. SOmeone else might know more about that than I do though.