How does the author use foreshadowing in The Gods Will Have Blood:?

In Chapter 20, Evariste considers the state of the Revolution, defining enemies as those who repudiate order while the judge's duty is to strike down all traitors. He knows the Tribunal is praised for sending many evil men to the guillotine, but this foreshadows the public turning against the Tribunal as they have so many of their heroes. Evariste believes that those who created the Revolution betrayed her, but he shows insight in his fear of where the procession to the guillotine will end if Robespierre continues to discover traitors; this foreshadows the deaths of Evariste and Robespierre.