In contrast, other Nichiren sects vehemently claim them as forgeries since they are not in the original handwriting of Nichiren or Nikkō, holding they were copied down by Nikkō's disciples after his death." In addition to using the letters to defend its claim to othodoxy, the documents may have served to justify Taiseki-ji's claimed superiority over other Nikkō temples, especially Ikegami Honmon-ji, the site of Nichiren's tomb. Even though there had been efforts by temples of the Nikkō lineage in the late 19th century to unify into one single separate Nichiren school the "Kommon-ha", today's Nichiren Shōshū comprises only the Taiseki-ji temple and its dependent temples. It is not identical to the historical Nikkō or Fuji lineage. Parts of the "Kommon-ha", the "Honmon-Shu", eventually became part of Nichiren Shu in the 1950s. New religious movements like Sōka Gakkai, Shōshinkai, and Kenshōkai trace their origins to the Nichiren Shōshū school. In the early 14th century Hokkeshū followers spread the teachings westward and established congregations (Jpn. "shū") into the imperial capital of Kyoto and as far as Bizen and Bitchu. During this time there is documentation of face-to-face public debates between Hokkeshū and Nembutsu adherents. By the end of the century Hokkeshū temples had been founded all over Kyoto, only being outnumbered by Zen temples. The demographic base of support in Kyoto were members of the merchant class (Jpn. "machishū"), some of whom had acquired great wealth. Tanabe hypothesizes they were drawn to this faith because of Nichiren's emphasis on the "third realm" (Jpn. "daisan hōmon") of the Lotus Sutra, staked out in chapters 10-22, which emphasize practice in the mundane world. In the 15th century, the political and social order began to collapse and Hokkeshū followers armed themselves. The "Hokke-ikki" was an uprising in 1532 of Hokke followers against the followers of the Pure Land school in 1532. Initially successful it became the most powerful religious group in Kyoto but its fortunes were reversed in 1536 when Mt. Hiei armed forces destroyed twenty-one Hokkeshū temples and killed some 58,000 of its followers.