Drama in fiction occurs in any clash of will, desires, or powers--whether it be a conflict of character against character, or character against society.
为何能判断从句中是虚拟语气?
根据 whether it be ...or ...就可以判断 whether...or ..从句中的 be 是虚拟语气,因为只有在虚拟语气中,单三人称主语才能用动词原形作谓语。