While denominationalism as an ism can be very idolatrous and divisive, denominations in themselves may not be evil. The only evil lies in the sectarianism intrinsic to denominationalism, for instance the unhealthy nurturing of denominational feelings.
1. Denominations that originated out of doctrinal differences historically played an important role in the reaffirmation of Christian faith.
2. Some of these played an important role in the purification of the Church and in refocusing in their times.
3. They also played an important role in the combined development of Biblical scholarship through Seminaries started to train the workers.
4. The Seminaries and Conferences also helped advance theological development.
In modern times, the chief differences relate to doctrine, practice, form of government, focus, and, perhaps, assets. However, modern Seminaries help to train cross-denominationally, especially in the evangelical and pentecostal movements. The only fears regard secularizing of theology in University and the growth of fake degrees that answer to nobody, especially where there is a lack of an accountability structure. Yet, when it comes to doctrinal issues, distinctions do revolve around the denomination or movement based conferences and seminaries. The fact that Acts 6 could be resolved administratively but Acts 15 resulted in doctrinal affirmation and division from the opposing group cannot be denied. Yet, this particular unity and separation of Acts 15, non-denominational, also set an example for future generations. We must know our common faith, the one faith that makes us one and disallow the minor elements from causing massive rifts.