Definition of Foreshadowing
In Chapter 1, London foreshadows the "trouble" that is about to befall Buck by writing that Buck does not read newspapers and is therefore oblivious to current events:
Buck did not read the newspapers, or he would have known that trouble was brewing, not alone for himself, but for every tide-water dog, strong of muscle and with warm, long hair, from Puget Sound to San Diego.
In Chapter 3, a husky attack interrupts a fight between Buck and Spitz. This moment foreshadows both Spitz's eventual death and Thornton's death at the end of the novel:
Unlock with LitCharts A+[T]he thing [happened] which projected their struggle for supremacy far into the future, past many a weary mile of trail and toil.
An oath from Perrault, the resounding impact of a club upon a bony frame, and a shrill yelp of pain, heralded the breaking forth of pandemonium. The camp was suddenly discovered to be alive with skulking furry forms,—starving huskies, four or five score of them, who had scented the camp from some Indian village.
In Chapter 1, London foreshadows the "trouble" that is about to befall Buck by writing that Buck does not read newspapers and is therefore oblivious to current events:
Unlock with LitCharts A+Buck did not read the newspapers, or he would have known that trouble was brewing, not alone for himself, but for every tide-water dog, strong of muscle and with warm, long hair, from Puget Sound to San Diego.