From Rainbow Post 17
From https://english.stackexchange.com/questions/7304/why-is-english-written-and-read-left-to-rightSide point: unless presented with excellent and very persuasive evidence, I am not going to believe anyone anywhere "first" wrote with a hammer and chisel in stone. That just strikes me as - - improbable.
The above source ignores the existence of left --->> right writing on clay by the Phoenicians for similar reasons: Avoid smudging of previous writing by a right handed person.Many languages that existed before the invention of ink were written right to left since this is the more natural for right handed people to hold a chisel in the left hand and the hammer in the right. After ink became the main method of writing, writing from left to right became preferable since it avoided smudging the ink.