Inspired by "
Dumbledore's Army" in the Harry Potter narratives, the Harry Potter Alliance (HPA) has been organizing fans around political and philanthropic issues since 2005. Based on the
House Cups in the books, the Alliance is organized according to the "Chapter Cup" model. Tapping fan infrastructures, including podcasts, blogs,
Wizard Rock concerts, mp3 networks, and YouTube celebrities, HPA runs its own campaigns tapping its 70 local chapters and supports efforts organized by partner NGOs.
