The eruption of two world wars marked a period of transition in which the intellectual and artistic environment underwent a drastic change. Such a gloomy era provided the inevitable situation for the fiction-writer to switch to new and bold fictional modes. Under such circumstances, the adoption of fantasy became one of the most interesting, satisfying and effective forms for projecting the modern novelist's vision. Fantasy can work as the most suitable board on which the fictional writer can apply his satirical vision and negate the value of our sense experiences. Indeed, Fantasy seems to be the exact mode through which writers of the genre can proceed effectively along their chosen path. As such, William Golding in his monumental work, Lord of the Flies, has tried to show a fantastic representation of Modern man's nature which leads him inevitably to savagery. Golding has created a dystopia by diminishing the adults to children to show that the modern man who denies the spiritual values is doomed to failure. Hence, in this paper tries to apply the technique of diminution, an oft-repeated technique in satirical writing, to prove that the animal side in man is the sole cause of his degradation and degeneration and if this animal side is not kept under control, the society will face injustice, repression, slavery and hatred.