"Any sufficiently advanced technology is indistinguishable from magic." – Arthur C. Clarke
An old story tells that one-thousand years ago, a rabbit-eared goddess descended from heaven and lived among warring peoples in the world below. Her ancestral people instructed her to find and claim a remnant of divine power, and she followed traces of mystical energy to the root of a great tree, whose fruit bore divine essence. But she grew fond of the people in whose world she lived, so with undying patience she waited and guarded the tree she was sent to claim, entwining herself with those who lived at its root.
As humans often do, however, they betrayed her, and her fondness for humanity turned to bitter hatred. In her anger, the goddess sought the inexorable power of true divinity, taking the fruit she was sent to claim and consuming it. From the first bite, she left her people behind and gained the power to end war forever.
The people rebelled against their goddess, the one who sought to subdue their reckless nature, and fought her with vicious ferocity. But the divine essence fueled and protected her. They broke like waves on rock.
Slowly, as the world settled into an uneasy peace under her rule, the goddess forgot her rage, grew to love a carefully-chosen few, and chose to bear children of her own. Kaguya, for that was her name, bore two sons; Hagoromo and Hamura, and together, they were more powerful than their mother. When they came of age, they left her side to subdue the restless few. They took no weapons, for they *were* weapons; weapons of divine authority and deific might, sent by the one true goddess to carry out her will.
And the rest is history; Hagoromo and Hamura destroyed the tyrant Kaguya, the Ten-Tailed beast awoke, was destroyed, and Hagoromo gifted chakra and the Tailed Beasts to the rest of humanity before his death, leading humanity into the Era of Warring Clans, Hashirama and Madara's alliance and the creation of the Hidden Village system.
That's what they say, anyway.