Wow, what a diverse and interesting thread. I'm not sure if I can form my thoughts into a coherent post, but I'll certainly try
Maybe the problem could be examined by looking at Sweden. Now, as we all know I think

, in 16th and 17th century Sweden, one of the poorest countries in Europe at that time, became a great power. How and why was this possible?
As for why, I think it's sufficient to say they basically just their neighbours when they were weak, to gain sort of a 'buffer zone'. (Simplification, but I guess it's good enough explanation here.)
So how was it achieved then? Firstly, the administration was propably the best in the world at this time. Because of the poorness of Finland and Sweden the swedes had to develop extremely efficient methods to raise taxes and troops off the poor land. Basically the troops were citizen soldiers, but there never was enough of them so lots of mercenaries were used, especially if the conflict dragged on for years. The government was pretty much centered on the king. The estates occasionally would have had the power to oppose the king, but usually the king could manipulate the estates to accept his decisions.
Second, Sweden had a great army with advanced tactics and technology (this was seen in 30-years war, after that the swedes had some trouble since the other countries caught up). Now this would, obviously, be a direct consequence of the first point: good administrative system would give flexibility to the army. A lot of credit would go to Gustavus Adolphus (or however you spell it

, but certainly the system helped him do his reforms.
So, how does this relate to the ongoing discussion? It appears that while the reasons for Swedens success were total war, good system of governance and, propably to a certain extent at least, the citizen soldier, there is hardly any connection to democracy and the ideas of antiquity. Or maybe there is, but anyone making such claim would have explain why this kind of development did not occur anywhere closer to Greece or the former areas of Roman Empire. The real driving force in creating a centralised system of governance was necessity, not ideas.
In this case it seems that total war and the citizen soldier were important in the succesful warfare. However in general I don't think they matter. The colonial empires were not created by all-out wars, but rather by naval power and not by citizen soldiers but by professional ones.
Uh what a rant..and my english is awful

Please, point out my mistakes and logical fallacies
