MahÃÂdeva (; ) is a controversial figure who appears in various roles in the histories of the early Buddhist schools.
Various sources present MahÃÂdeva as playing different roles, and the historical existence of such a person is often criticized. In sources deriving from the SthaviravÃÂda branch, he is taken to be the founder of the MahÃÂsÃÂá¹Âghikas, and the figure who caused the split between the two branches. According to this account, some 35 years after the Second Buddhist Council at Vaishali, there was another meeting over five points allegedly held by a figure named MahÃÂdeva. These five points were essentially regarding doctrines of the fallibility and imperfection of arhats, which were opposed by some. In this account, the majority (MahÃÂsaá¹Âgha) sided with MahÃÂdeva, and the minority (Sthaviras) were opposed to it, thus causing a split in the Saá¹Âgha.
However, scholars have generally agreed that the matter of dispute was a matter of vinaya instead. In the earliest account, the council was convened at PÃÂá¹Âaliputra over matters of vinaya, and it is explained that the schism resulted from the majority (MahÃÂsaá¹Âgha) refusing to accept the addition of rules to the Vinaya by the minority (Sthaviras). This account is bolstered by the vinaya texts themselves, as vinayas associated with the Sthaviras do contain more rules than those of the MahÃÂsÃÂá¹Âghika Vinaya. For example, the MahÃÂsÃÂá¹Âghika PrÃÂtimoká¹£a has 67 rules in the à Âaiká¹£a-dharma section, while the TheravÃÂda version has 75 rules. Modern scholarship is generally in agreement that the MahÃÂsÃÂá¹Âghika Vinaya is the oldest. Joseph Walser concludes that this MahÃÂdeva was most likely a literary figure.
The Samayabhedoparacanacakra records that MahÃÂdeva was a completely different figure who was the founder of the Caitika sect over 100 years later. A number of scholars have concluded that an association of "MahÃÂdeva" with the first schism was a later sectarian interpolation. Jan Nattier and Charles Prebish state that MahÃÂdeva was the later founder of the Caitikas, stating:
Numerous legends about MahÃÂdeva exist, all of which refer to the figure who supposedly caused the first schism in the Buddhist saá¹Âgha.
He was ordained at Kukkutarama in Pataliputra, before taking the head of the sangha. The story of his transformation from a sinner of the worst kind to a learned monk was among the collection of tales relating to Buddhism, taken back to China by Xuanzang. The story of his transformation is titled as "The sins of Mahadeva". His father was a wealthy and ambitious trader who had married at a very young age. He often went away to foreign lands to trade and amass wealth. It is said that Mahadeva had a very pleasant and radiant face. But he was unfortunate not to get the love of his father during his childhood. In his teens he committed his first sin, by indulging in an incestuous relationship with his mother. Mahadeva was frightened of his father coming to know about this relationship and hence murdered him, thereby committing his second cardinal sin. He then, in order to escape from the guilt ran away with his mother to a distant land and started life fresh. But there, one day he ran into an old neighbour who was on a tour to the land that Mahadeva had made his new home. The man was treated as a guest and was given refuge for a few days in Mahadeva's house. After a few days the guest started asking questions about Mahadeva's sudden disappearance from his native land. Mahadeva felt threatened and poisoned the guest, thereby committing his third cardinal sin. Some years later he began to doubt his mother, for whom he had committed all the murders. When he found that his mother was involved in a relationship with another man, Mahadeva felt emotionally wrecked and out of his frustration he murdered his mother thereby committing the fourth cardinal sin of his life. After this incident Mahadeva found his life meaningless and teetered on the brink of insanity. He, in fact was about to take his own life when he came to know that a Buddhist monk with a panacea for sinners had arrived in the town. Mahadeva decided to give his wretched life one more chance and approached the monk who was camping near Pataliputra. It was at this place that Mahadeva was ordained as member of the Buddhist sangha.