Complex sentence: The need for written laws began with the unequal access to legal knowledge by the aristocracy and the people; the established laws of Athens were inefficiently formulated in the spoken language and often modified and re-evaluated.
Split into simpler sentences: The need for a codified text of written laws commences with unequal access to legal knowledge between the aristocracy and the people. This was so because the established laws of Athens were inefficiently formulated via spoken language and often modified and re-evaluated.