Ok there are so many post on this subject that i browsed a few an saw one reference to the colt revolver from the 1800's.
I have to say that the 1911 was updated just as the Colt Peacemaker. They both set the stage for their respective handgun types and every American revolver and semi-auto followed.
To me you have to separate revolver from semi-auto and if not, can anyone not argue that the Peacemaker is as much the American sidearm of its time?
There is no way that the 1911 is number one and anything other than the peacemaker number two!
While we are at it, would Glock be known as number three? Whether it was the first or not, it was the first successful and most well known polymer handgun setting yet another stage for many to follow!
If you ever have to use a firearm, you don't get to pick the scenario!