I'm right handed.
Sririam earlier mentioned hygiene, that people ate with right hand and cleaned themselves with left, right hand being 'clean', left not.
You were right Sririam, I have it on good authority that left handed people did it the other way around. Common sense really.
It's a travesty that kids used to be forced to write with their right hand when left handed. Doesn't make sense!
I've not heard of left handed people being considered evil but there are some very strange people about. (I once met someone who believed owls were evil and so was the stone, jade!)