So we have a new era, setting, and magical community to look forward to this Fall. But we don't have to go into this film blind, unless you want to..
J.K. Rowling released a brief history of the magical community of North America a little while back. It introduces the point where the community began to be formalized, how it functions in a non-magical land, and the threats that have emerged.
No-Majs, Ilvermorny, MACUSA, Pukwudgies, Scourers. Rappaport's Law.
If you don't feel like reading today, various fans have put together videos to explain it all.
A look at North America's wizarding history:
The origin and culture of Ilvermorny, the American School for Witchcraft and Wizardry: