In Oliver Twist, Dickens did not attempt to sugar coat the illegal world. He labelled this world honestly. This was unblemished in his "to display [criminals] as they actually are forever lurking nervously through the dirtiest paths of life...would be a facility to society." Dickens thought that by showing the actual picture of the criminal world as it is (practicality), the society would be enthused and interested to find active answers to resolve this problem.
