How does the title "The Jungle" relate to the themes of the novel? Give specific examples.

The novel’s title symbolizes the competitive nature of
capitalism; the world of Packingtown is like a Darwinian jungle, in which the strong
prey on the weak and all living things are engaged in a brutal, amoral fight for
survival. The title of the novel draws attention specifically to the doctrine of Social
Darwinism, an idea used by some nineteenth-century thinkers to justify the abuses of
wealthy capitalists. This idea essentially held that society was designed to reward the
strongest, best people, while inferior people were kept down at a suitable level. By
relating the story of a group of honest, hardworking immigrants who are destroyed by
corruption and evil, Sinclair tries to rebut the idea of Social Darwinism, implying that
those who succeed in the capitalist system are not the best of humankind but rather the
worst and most corrupt of all.