The Call of the Wild was written by Jack London who was a famous ,widely read ,and best-known writer in America in twenty century. This book tells us an experience of extraordinary dog-Buck who is a massive ,strong regal dog with a rich coat of fur. At the beginning of the story, Buck is a pet of a rich judge`. And he spends his days leisurely. Unfortunately, he is stolen by a gardener and sold to the north to work as a sled dog. Everything in his surround is the opposite of comforting familiarity of house. He has to face varieties of fierce and dangerous situations independently. With time goes by, Buck learn how to fight against attacks by other dogs and struggle for good ,at the same time ,he becomes stronger and stronger. But he is hopeless in the face of the clubbing and starvation by men. Changes happen to him.when he is gonging to be beat to death,john Thornton save him and take care of hin until recovering. They become best friend. Unfortunately again,his master is killed by Indian,he becomes homeless. Simultaneously, he faces the challenge of being accepted by the wolf pack and he chooses to take leadership of the wolf pack.

This novel continues the "survival" theme of jack London's novels: life always gains meaning and power in the process of struggling for survival.London personified buck, a dog. He depicted the world and human nature incisively and vividly in buck's eyes, reflecting the cold reality of capitalist society and the objective reality of "the survival of the fittest". Buck yearns for and runs towards freedom, which is the embodiment of the author's pursuit and ideal. The Call for the Wild tries to show that the environment changes more than the direction of life.