A Fanfic by Belcris, you can read it here: https://www.fanfiction.net/s/4045979/1/Harry-Potter-and-the-Future-Uncertain
Harry and Ginny are dead. Or are they? Transported to a future where magic is a crime against humanity and science is the only accepted truth, Harry and Ginny must fight against a world gone mad, or die trying.
This fanfic provides examples of:
- A Nazi by Any Other Name: the BSA.
- Bad Future
- Big Bad: Peter Weasley
- Broken Pedestal: Harry and Ron avert the shit out of this trope by choosing not to tell the Weasley's that Peter Weasley was the leader.
- Earn Your Happy Ending: At the end, Hogwarts is back from the ashes, the magical world is restored and Muggles no longer know about the Magical World.
- Foreshadowing: One of the first clues towards the leader's/ Peter Weasley's identity is the mentioning of him having red hair.
- Small Name, Big Ego: Greg Weasley, he claims to have "admirers"