What are the motifs in The Runaway Jury by John Grisham?

The idea of the triumph of the underdog, or the David versus Goliath concept is a recurring idea throughout the novel and enhances and compliments the ideas of justice and power. There are many instances where this occurs - the plaintiff over the tobacco companies, Hoppy over Fitch's goons and Nicholas and Marlee over Fitch. These events reinforce the idea that money does not always buy power or justice.