(image by: Nicholas Hodder)
(image from: Brian Lucas)
I never knew this big vast majority drive on the right o_O
anyway, reasons why people drive on the left :
-Knights passed on each other's right (walk on the left) to ensure that their protective sword arm was between self and potential opponent.
-Right-handed person finds it easier to mount a horse from the left side of the horse. It would be very difficult if one wears a sword (which would be worn on the left) to mount and dismount in the middle of traffic way...
Check out the links if you are so interested, I believe there are more info than one would care...lol
"Why do British drive on the left?"
"Why does Japan drive on the left?"
Brian Lucas: "...I think that the role of the sword has been exaggerated."
via: Michael Lehman's blog