The first public assembly was held in 1867 representing something akin to a spiritual town meeting with an audience ranging from Progressive Quakers, liberal Jews, radical Unitarians, Universalists, agnostics, Spiritualists, and scientific theists. The first person to join the association at the original meeting was the famed American individualist Ralph Waldo Emerson. It caught on and many FRA members helped to lead communes based on their values on equality and self organizing organizations.
Today while it is hard to find an FRA meeting, let alone anything remotely akin to the kind of town meetings of the early Americas, many of their beliefs are alive and well and some could say even growing at an exponential way. Thanks to the force of the internet people today are now completely free and able to join together with almost anyone anywhere in the world that may share the same intentions, ideals, goals, beliefs, and even the most petty of personal preferences in a massive way unprecedented in all of human history.