Sravasti Dhammika has in his blog told us about a sutta in which Bhagavan Gautama tells bhikkhus about His travels in distant lands and about his teaching the Dharma there, Bhagavan says: "I adopted their garments, their diets, their customs, only then did I teach them Dharma. Then I went to another country and did the same,.. and yet another country,..."
From different existing facts we can conclude that in the first centuries after Parinirvana, or starting even after his enlightenment under Bodhitree, there never was a one unified Sangha, there never was a one unified Doctrine of Dharma, there never was a one unified Vinaya.
Buddha Gautama had preached the doctrine to different peoples according to their understanding, in different ways, in different localities and countries. From the beginning the Dharma existed in diverse different forms, in different languages. It existed in several languages, maybe something like a dozen languages.
100 years after Parinirvana there where some six, seven, eight, or even twenty local independent Sanghas, that each had their independent doctrines and customs and codes of behaviour, and they existed in different languages. At this period the tradition was solely oral.
Dharma existed also among the laity, from the beginning Buddha had taught all people without distinction. Those converted did not always become monks or bhikkhus.
Dharma also existed among the outsiders, ie nonbuddhists, because Bhagavan had often discussed with them.The outsiders did preserve their own versions of what really took place (in the career of Buddha Gautama).
During the first one hundred years the Dharma and Sangha had thus developed into very different and distinct traditions. Buddhists were to some extent aware of this, but they didn't mind.They didn't as yet start any projects of creating an artificial unity of doctrine and dicipline. That happened much later, first attempts toward it took place 300 and 400 years after Parinirvana.

