Romeo’s fatal flaw is his impulsiveness. Throughout Shakespeare’s play “Romeo and Juliet,” Romeo often acts without thinking about the consequences of his actions. This impulsiveness leads to a series of tragic events. For example, his quick decision to marry Juliet, despite the feud between their families, sets the stage for the ensuing tragedy. Additionally, his rash decision to kill Tybalt in a fit of rage after Tybalt kills Mercutio results in his banishment from Verona. Finally, Romeo’s impulsive decision to take his own life upon mistakenly believing Juliet is dead ultimately leads to the tragic end of both lovers. This lack of foresight and tendency to act on emotion rather than reason is what makes impulsiveness Romeo’s fatal flaw.