ADJ-GRADED 灾难性的;引起巨大变化的 A cataclysmic event is one that changes a situation or society very greatly, especially in an unpleasant way. 灾难性的;引起巨大变化的 [formal]
...the cataclysmic events that were destroying his faith in humanity.
摧毁他对人性的信念的灾难性事件
Few had expected that change to be as cataclysmic as it turned out to be.