How does the author use foreshadowing in Jailbird?

The Cuyahoga Massacre, a violent confrontation between workers, bosses and law enforcement agencies is described in detail in the novel's prologue. Its inclusion in the narrative serves two purposes. First, it defines the character of the individual (Alexander Hamilton McCone), who is one of the prime formative influences
on Walter Starbuck, and who in turn defines him. Second, and even more importantly, the event foreshadows the ongoing tension between labor and management (and by extension between socialism/communism and capitalism) that underpins the book's central theme and much of its plot.