Buck
Quote 81
It was the call, the many-noted call, sounding more luringly and compellingly than ever before. And as never before, he was ready to obey. John Thornton was dead. The last tie was broken. Man and the claims of man no longer bound him. (7.42)
Buck is only able to join the wild once Thornton dies.
Buck
Quote 82
In a flash Buck knew it. The time had come. It was to the death. (3.37)
Buck’s fight with Spitz has to end in death because of the nature of the two dogs.