Why would hammurabi put his laws on public display at a time when almost everyone was illiterate?

Hammurabi's code contains a few pronouncements concerning slaves. Slaves appear to be a center piece of the economy in Babylonia. The codes express that the lord won't remain for anybody that tries to free a slave or shroud one. In this way, the slaves appear to hold an exceptionally critical esteem. The offenses including slaves are more extreme than alternate offenses in light of the fact that there is no resistance. On the off chance that discovered submitting one of the offenses, undoubtedly the wrongdoer will be executed.