Think about why left-to-right languages are left-justified. It's because when you're writing by hand, you can't possibly know in advance exactly how long the l

Think about why left-to-right languages are left-justified. It's because when you're writing by hand, you can't possibly know in advance exactly how long the line is going to be, so you have to start at the beginning and write until space runs out. But now we have computers. We no longer write by hand. It's trivial to have the computer justify text however we wish. So now we ask the same question again, which way should we justify text now that it is trivial to do it either way? To me, "do it the way it's always been done without question" is a non-answer that leads to exactly no evolution whatsoever.