After his divorce, Ed Logan declared, "Man, the good ones are all taken." This little bit of wisdom came to be called "Logan's Law". However, his friend, Steve Whortleberry, discovered that "Logan's Law" wasn't absolute.
A Jewish-Americanwriter set out to tell a story, but instead contemplated his divorce from his first wife. His mind turned to how he and his first wife might have made the marriage work. He thought about the choices they each made, and then concluded that the marriage was doomed in the world as is/was, so he began a thought-experiment of rewriting history. However, as he mentally reached back in time, contemplating and discarding options, he realized that there was no period in which he could save the first marriage.
In accordance with his desire for an heir, King Henry VIII made divorce permissible in the Protestant Church of England, but required the explicit authorization of the monarch. Consequently, divorce was all but impossible for ordinary people, as they would be unlikely ever to attract the monarch's attention.