Abhidharma, Abhidharma

Due to famines and constant wars, the monks responsible for recording the oral tradition felt that there was a risk of portions of the canon being lost. With the rest of the Canon the Abhidharma pitaka was written down for the first time.

In particular, the Theravada Abhidharma contains two texts (the Katha Vatthu and Puggala Pannatti ) that some consider entirely out of place in an Abhidharma collection.

Source: Wikipedia > Abhidharma