Wikipedia provides a good overview of the different theories of the Synoptic gospels' origins (see the summary at the end of the entry especially): https://en.

Wikipedia provides a good overview of the different theories of the Synoptic gospels' origins (see the summary at the end of the entry especially): https://en.m.wikipedia.org/wiki/Synoptic_Gospels#The_synoptic_problem https://en.m.wikipedia.org/wiki/Synoptic_Gospels#The_synopti...