This is a discussion paper to invite your views on this subject. In this world of binary and pairs, existence of one makes the other certain or inevitable. Birth defines death. So does marriage.
Separation is certain and inevitable.
This could be due to any number of reasons, like separation due to death of the partner, or divorce. This is as certain as death. Only the length of the life or the life of living together is questionable. Divorce, together with the dealings with lawyers and courts, have become one of the biggest industries in the world. In the USA alone, it generates around 30 billion dollars every year, most of it for the benefit of the lawyers, judges, and courts.