One thing I have discovered very quickly is that there are some people, be they writers of fiction or readers of the same, who hold some very seemingly illogical opinions.
One such thing I find people very passionate about are the means though which an author should provide backstory.
More than a handful of people I have encountered say really strange things on this topic like that they do not read prologues because if it something not part of the "main" story they are not interested in it and that the author should give all information the reader requires during the course of the story.
This boggles my mind because prologues are and always have been considered parts of the stories to which they belong.
Many famous and great works of fiction have prologues.
Are people who so ardently claim to be against prologues saying that when they go to see a classic play like Shakespeare's Romeo and Juliet they refuse to take their seat until after the prologue? Nonsense! Silliness! Even I am not using prologues, right now, in any of my stories, I do have ways outside of the main body of the story to introduce important backstory elements.
Why? Because back story is important.
And every story requires the backstory to be told.
But not every story can effectively integrate flashbacks or dialogue between the characters to accomplish this task.
In my novel in progress I am currently using aside chapters thought the book to relay backstory that was not easily integrated into the bulk text.
Putting it into the main text has an awkward feeling and to accomplish the telling of much of the backstory in the story proper resulted in long monologues about what someone recalled.
These aside chapters are two or three pages of historical text written by someone other than the main point of view character and are there to provide some counter knowledge and perspective that his own prejudices and the prejudices of the characters he interacts with simply does not allow.
For another project I have opted to provide back story prior to each chapter with a one or two-line quote about events and perceptions provided from various people in the world.
Some of these people appear in the story and others do not.
My advice to all authors is to write your story the way it needs to be written.
If your story needs a classic prologue then use one.
If it needs some other means to disseminate historical information that happened before Chapter 1 then do not be afraid to incorporate that information for fear that someone with an irrational fear of that method might be offended.