The way it spread and survived for several centuries makes it unique in the annals of religious dissidence. Most historians agree that the movement had its start about the year 1170.
ज्या पद्धतीने तिचा प्रसार झाला आणि ज्याप्रमाणे ती कित्येक शतके टिकून राहिली यामुळे ही चळवळ धार्मिक मतभेदाच्या इतिहासात निराळी ठरली.