One of the greatest things about the internet is getting to read serious posts on serious topics like the Death Star and whether it was worth it for the Empire to build it.
But will it work? Only if it induces cooperation through fear. Every planet blown up represents a tremendous loss of potential future revenue, so like nuclear weapons today, the actual use of the DS is a calamity. Moreover, like nuclear weapons, they only work as a deterrent if they are used judiciously. Citizens throughout the galaxy must believe that failure to pay their taxes and comply with their Imperial masters will lead to detonation, but also that compliance will save them. The fact that the DS was used against Alderaan, however, would likely have had the opposite effect. Alderaan is “peaceful” and “has no weapons.” It was detonated because its teenage senator was secretly aiding the Rebel Alliance and waited too long to give up Dantoonie. To me, that’s a little too Caligula to induce rational compliance. One imagines the conversations on other planets:
Peasant 1: Did you hear the Empire blew up Alderaan? What kind of government blows up one of the richest planets in the galaxy because of one smack-talking teenager? It could be any of us next.
Peasant Windu: Enough is enough! I have had it with these [redacted] emperors on their [redacted] Death Star!
The whole thing is worth a read.