Back in the dark ages--that is, well before the internet--when my parents got divorced I did a lot of reading. One of the things I read was about a study that looked at people who had divorced and then married someone else, a second marriage. Explicitly asking people to compare both of their marriages and their conduct in each as well as asking if the divorce from the first marriage had solved any problems. A surprising number of people said that a lot of the same sorts of issues that led to the dissolution of the first marriage was present in the second marriage. Further, it was combination of a desire not to be twice divorced and the realization that it wasn't necessarily the fault of their first spouse, caused them to confront, understand, and work on the issues--and acknowledging that they could have done this in their first marriage, but didn't, to their regret.

That really made an impression on me.

I have, from time to time, searched for this study, or reference to it, on the internet, but have not yet found it.