I kinda dissagree here. I think there are three main reasons for the shape of the gladious.
The Romans had exposure to every kind of sword and hand weapon currently in use in the world in their time, (outside of the Pacific islands and say, Central America, and the hand weapons used in those zones had their equivalent in Europe and Africa) They chose the Gladius because of it's lethality. Certainly a secondary cutting ability was valued, and taken advantage of, but lethality in the thrust is key.
Also, keep in mind I was primarily referring to the Pugio, the Roman dagger, which was also broad and pointy for thrusting and causing catastrophic damage..
You also mention that a blow to the hand works almost as good as one to the CNS. I completly dissagree. Sure swords do plenty damage, but in a fight YOU JUST DONT KNOW what effect your "damage" will have until its over. It doesnt matter if you cleave off half the muscles on a guys sword arm if he's in survival mode he'll kill you with the minimal amount of musles needed to do so.
Even a man whos a gorey mess can still be a threat.
I don't know how much sparring or test cutting you have ever done, but a sword cut can sever a hand without being a remarkable cut. A successful amputation would be quite apparent. A cut sufficient to cause somebody to drop their weapon would be even less difficult, I have done it pretty frequently on accident with padded weapons against people wearing protective gloves..
As far as stopping somebody in an adrenaline rush frenzy, there are physical limitatons that no amount of adrenaline can compensate for. I have seen people in frothing, foaming rages completely incapacitated by a broken ankle, collar bone or wrist.
On the other hand I have been pepper sprayed pretty thourougholy without much effect. I have seen people beaten in the head with flashlights, bats, pool cues, and bottles with no apparent effect.
Dealing with someone with less than lethal or relatively soft blunt trauma weapons, (plastic, rubber, wooden and / or aluminum blunt objects etc.) is a completely different ball of wax than dealing with people with sharp and hard-edged weapons designed to murder and dismember. It's fairly shocking reality many might not like to really consider, but thats the reality. More on this in my other post...
I also dissagree with your sweetspot theory I think a thin strait line through the body has an awsome chance at giving a fatal wound although not as quick as CNS destruction.
You should review the FBI statistics on ballistic injuries, you might change your mind.
Jeanry

