Symbolism of Wine in A Tale of Two Cities

In the novel A Tale of Two Cities by Charles Dickens, various objects and characters symbolize broader themes and ideas throughout the narrative. One of the prominent symbols is the broken wine cask in the first chapter, which spills its contents across the streets of Toulouse. The act of the wine spilling and soaking the thirsty ground is often interpreted as a foreshadowing of the impending violence and revolution that will shape the fate of the characters and society.

Consider the passage below where this scene is described:

"The wine was red; it spilled upon the street and soaked into the ground, as if anticipating the blood that would soon follow in uprisings and battles. It was as though the very earth hungered for the fervor of chaos and rejoiced in the red liquid that promise unrest and a change to come."

In this passage, what does the wine primarily symbolize in the context of the novel?