But I’m curious if any of those who believe “Hareidism” is indeed a “modern phenomenon” can name any of the founders of this new movement, and how their beliefs differed from those of their teachers.
Charedism today is basically 2 parts Chassidism and Litvish/Yeshivish/Misnagdish
Chassidism comes from the Baal Shem Tov and his followers
And LItvish/Yeshivsish//Misnagdish comes from the Vilna Gaon/The CHasam Sofer and their followers which was formed in response to Chassidim whom they considered to be wrong