Complex sentence: A central question is how these communities developed and what their original convictions were, as a wide range of beliefs and ideas can be found in early Christianity, including adoptionism, docetism and gnosticism, which were deemed heretical by proto-orthodox Christianity.
Split into simpler sentences: A central question is how these communities developed, and what their original convictions were. A wide range of beliefs and ideas can be found in early Christianity, including adoptionism, docetism and gnosticism, which were deemed heretical by proto-orthodox Christianity.