Re: On mirrors on the left and the right
Everyone kept left until Napoleon decreed that "it shall be changed"
Sitting on the left or right depended on the kind of cart in use (assuming he wasn't sat in the middle)
Drays and other "truck" equivalents tended to have the driver sitting where he could see the curb/wall he was hard up against (breaking a wheel was bad news), whilst other carriages had the driver sitting where he could ensure that he wouldn't be banging into oncoming traffic.
The "handedness" of driving is like NTSC/PAL and 110/230V - rapidly becoming irrelevant. Robot cars will drive that fairly quickly once they hit mass adoption and I'm pretty sure it will be sped along by vastly stricter driving license requirements (cars themselves will probably revert to 1930s ownership levels, even if individual access to them increases.)
Biting the hand that feeds IT
