On what authority is Soka Gakkai based?

http://xenu.com-it.net/sette.htm

One must do some digging but one can find some very useful information on the Gakkai. Max Weber, the world famous sociologist, talks about charismatic authority versus constitutional/scriptural authority [authority based on the Law]. Soka Gakkai is based on the former. Nichiren's Lotus Sutra Buddhism is based on the latter.