iconoclast
n. 攻擊傳統觀念的人; <史>反對崇拜聖像者
If you describe someone as an iconoclast, you mean that they often criticize beliefs and things that are generally accepted by society.
Cage was an iconoclast. He refused to be bound by western musical traditions of harmony and structure.
凱奇是個反傳統的人。他拒絕接受西方有關和聲和結構的音樂傳統的束縛。
1. someone who tries to destroy traditional ideas or institutions