[QUOTE=Frylock]
Chord-and-strum guitar playing, anyway, involves a lot more intricate movements in the left hand than the right hand. This is surprising since most people are right handed. Do we know how it came about?
[/QUOTE]
I’d guess part of it is because traditionally the right hand on the guitar didn’t tend to strum and certainly didn’t use a pick - it used to pluck the strings individually, which is also a very intricate and dextrous task which arguably requires greater dexterity than simply holding down the strings on the neck.
Similarly, I agree this is true for a lot of food nowadays, but historically if you were cutting tough meat a lot, and being served food in larger slabs that had to be sawed down rather than in more delicately-sized portions like today, it was probably obvious you needed the knife in the right hand. It’s true even today to an extent - try eating a steak with the knife in the left hand, for instance.