Who is the antagonist of South Pacific the musical?

In the musical "South Pacific," the primary antagonist is the character of Lt. Cable, who struggles with his prejudices and societal expectations regarding race and love. Additionally, the character of Captain Brackett embodies the attitudes of racism and discrimination prevalent in the military at the time. Their conflicts highlight the themes of love, acceptance, and the impact of war on personal beliefs. Ultimately, the musical challenges these antagonistic views through its portrayal of interracial relationships.