Board Thread:Rebirth: Applications/@comment-4869113-20141009234549/@comment-4869113-20141012235427

Depends on what he had to survive. I would argue that Jugo's Clan originated in the Land of Demons which heavily hints to the corrupted state of the land, which would sort of make sense that they are insane to such a heavy extent. But, I'll offer his background instead...

Following the conclusion of the Fourth Shinobi World War and the resealing of the Shinju spirit, the natural energy of the world found itself gravely altered and corrupted. Specifically, the sealing charms implemented by the priestesses of the Land of Demons found themselves broken, releasing countless numbers of demons back into the land. A fellow demonic clan themselves whom had been sealed away in the deep abyss of the temples where they thrived off of one another’s flesh, giving birth only to eat the child once they had grown up, was released into the world. The clan traveled in packs, hunting and devouring any travelers they came upon until they were inevitably enslaved once more by a more powerful group. Forced to work in a mine for these demons whom were using their physical bodies to help harvest materials that would be used for the construction of a tower, the demonic clan found themselves in the same situation as before.

So, basically that's about it. HIs clan was sealed away, ate one another to survive, and he was born to those who escaped that faithful day