The original christian churchs were "home churchs", people gathered in each others homes and talked about Jesus and God.
Of course as things get bigger the term "organization" ie: Control, rears its ugly head and what happens?
Love becomes stagnat woth rules and regulations, the very thing Jesus warned about and was against.
Still, how does one "propagate" a faith without control and without some sort of organization?
Well, it can be argued that one can put their trust in God, Jesus and the HS, but men temd to put far more trust in themselves and voila, you have an organization born.