Because your question is rather incomplete, I am unable to answer it all. The term, "the rift widens" means that the division or opening between two people, ideas, or countries has gotten larger. The word rift can mean a problem also, and the word widen suggests that it has become worse. As for the events, which events do you mean and from what source? If you mean which events are the steps to widen the division, look for the problems the people have and how they allow the problems to worsen without making an effort to correct them. You could also look at the efforts they make to correct the division which do not work. Just put them in order and show why they don't accomplish the healing this rift needs.