The excessive cruelty and portrayal of human suffering in the play make the world seem terribly unjust. Throughout King Lear, characters constantly appeal to the gods for aid but are rarely answered. The play suggests that, either the gods do not exist, or they are unimaginably cruel. King Lear seems to argue that it is up to human beings to administer justice in this world.
In King Lear, the gods either don't exist or, simply don't care about human suffering – suggesting that justice does not exist in the world.
The play suggests that the only way there can ever be justice in the world is when human beings behave justly toward one another.