Answer:
Mary Shelley gives the perspective of The Monster as well as Victor to show that outer appearances do not define what a living being could be and that often their surroundings make them turn rogue.
Step-by-step explanation:
Before The Monster's point of view comes up in the book, we already know about his crimes. so when we find out his side of the story we understand that Victor himself is to be blamed too for judging his own creation due to its unpleasant appearance.
the eloquence of the monster makes a pre-Darwin case for social Darwinism. the monster is able to learn because he has access to good books but turns to crime when his environment turns around him. so a person is as much a product of their surroundings as that of their hereditary features.