The roots of the Jesus Movement to fulfill the teachings of YHWH center on houses of worshipers meeting secretly, since neither the Establishment of Jewish leaders, nor by extension the Roman occupiers wanted to see something that did not conform to peaceful social order and status quo. Later, the early church spread along the trade and transportation routes around the Mediterranean basin and attracted not only Jews far from Jerusalem's sway, but other God-fearers, as well as pagans - citizens of Rome, its slaves, and those from inside and outside the Empire.
The status of outlaw sect of Judaism changed overnight with the declaration by Constantine at the beginning of the 4th century C.E. that Christianity would be the State Religion of the Empire and that he would be its champion in the wide world (the Edict of Milan in 313, which declared tolerance for Christianity in the Roman Empire). His pledge to do this if YHWH would allow military victory thus was fulfilled after defeating the attackers at the battle of Milvian Bridge.
From now on the followers of The Way could own property, govern themselves openly, establish schools of learning and all the things that make a group of people an organization and perpetuate it until at last becoming a self-sustaining institution. Hierarchies grew, buildings were endowed, traditions of knowledge expanded, and doctrinal hairs were split ever more finely. With power comes corruption. Reforms came and sometimes gained traction. Sects splintered and power in the World grew bigger and bigger.
Importantly, Jesus answered Pilate by saying "my kingdom is not of this world." And a good deal of the meaning behind the phrase of the Lord's Prayer, "...Thy will be done; on Earth as in Heaven," is about one's own heart. That is, the Kingdom is not something standing on the surface of the planet, but instead dwells within each practitioner's own heart: the person's attitudes, habits of talking, strength of relationships, daily exercise of care for others, expressions of humility and also unshakeable faith, and so on. Therefore, the watershed begun with Constantine the Great to bring Christ-followers into the light of the world to freely worship and evangelize, is a mixed blessing and curse. The blessing is the reduction in persecution. The curse is the accumulating power, generation by generation, that imposes temptation and corruption.
Given the choice of fringe religion and mainstream institution, perhaps most would opt for today's model. But maybe there is a third way, neither institutionalized rigidity nor small-time desperation. Perhaps the sweetest form of The Way is to be in the World but not of the World; blessed by the material well-being and physical abundance that may be put to good use, but not redirected from stewardship of God's creation and distracted by stewardship of "stuff" bought or bequeathed from the faithful.
The question remains: can it still be Christianity when there is wealth and power and prominence involved?
