Had Mrs. Wallis Simpson proved less attractive to Edward, or had their paths never crossed - think life in another dimension - history could have taken many, many different turns. Diana might still be around - perhaps not as Princess Di, but out there happily raising a gaggle of kids in more than comfortable circumstances, somewhere in the Home Counties. Princess Margaret, not as sister to the heir to the throne, might have led a very different, happier and more serene lifestyle. Perhaps even King George VI, without the stress of being monarch of all he surveyed during a terrible World War, would not have died so young.
Domino effect, causal nexus......chain reaction. It's a funny ol' life!
Cue the song: