Some thoughts on Klingon history, culture and fuedal hierarchy. This is how I see the 1st, 2nd and 3rd empire's. 1st empire Starts around around 1940 and ended around 2160. Klingon have gained post war tec At this time the houses where more unfied under a strong chancellor or chancellors and it has a central military along with the individual houses having their own private fleet. During this time the basic boarders of Klingon space are expanded and nearby "lesser" races conquered Around 2160 the empire collapses, maybe due to the death of the chancellor or/and internal strife caused by the augment virus plus romulan intrigue. The Augument virus and collapse into a mini dark age could of brought on the culture of being "hyper klingon" and going overboard. Central ship building along with the chancellor's power and fleet break down leading to 24 mini Klingon empire's doing their own thing. You then get 2256 and the war. It's failure and Lrells chancellorship brings about the secound empire. Under her leadership the chancellor's position becomes meaningfull again and a centralised Klingon military is again formed,though the houses still have their own ships. Klingon enter a period of cold war and shimmering hostility. Certain houses though being more keen to attack the federation than others. The empire again is on the uprise. 2293 happens with praxis exploding. The empire is thrown into disaray and forced i to accepting a less aggressive lifestyle in trade for federation aid. This leads to more reforms. This beguins the 3rd empire. The chancellor has less central power due to demilirisation , yet the houses still have considerable assets resulting in the ease of civil war we see in TNG, plus the fact that some houses are still hostile to the federation despite the official stance of peace with the federation. The Klingon military is now organised into the Klingon defence force. As for the houses. My guess is that each major house holds govership over multiple world's. Ships are not just tools but like swords are viewed as valuable/almost sentimental family assets and are carefully maintained , upgraded and modified. Even in the TNG we see different variants of the B'rell class like ones the duros used i generations. Minor houses would hold governorship over minor planets or moons or even provences and are the equivalent to medievil knights or lower nobility IE in service to a great house. All houses would own assets of various degrees on qonos. Each house would hold unqiue views of other species, some being more inclined to humans and others like duros being more friendly yo to romulans. As far as why warriors are dominant, it is likely as the view is similar to medievil Europe where leaders like knights, lords, princes and king where expected to fight alongside their men in war,therefore all leaders had to be by default warriors. Other profession exist but you will never get any sort of political power or hold it unless you are willing to fight.