Zayd ibn Ali
Zaydis are the oldest branch of the Shia and are currently the second largest group after Twelvers. Zaidis do not believe in the infallibility of Imāms, not ascribing them with any supernatural qualities, but promote their leadership. Zaydis believe that Zayd ibn Ali in his last hour was betrayed by the people in Kufa. Zaydis as of 2014 constitute roughly 0.5% of the world's Muslim population.