RECOIL has a 3 part article that looks at history and evolution of shooting stance. It actually starts off with historical stances with swords, progresses to firearms.
Definitely a great read for those who want something beyond firearm-centric study
Part 1: http://www.recoilweb.com/a-look-at-fighting-stance-part-i-samurai-hoplites-and-johannes-liechtenauer-30765.html
Part 2: http://www.recoilweb.com/fighting-stance-part-ii-pike-shotte-and-gunfighting-30799.html
Part 3: http://www.recoilweb.com/history-and-the-fighting-stance-30831.html
From: RECOIL
