These are quotes from the Books I have found to be of interest on the topic of Brotherhood.
It is not meant to be anything other than the facts of the matter.
Arrive at your own conclusions.
I wish you well,
Holding Together Grass and Earth
Suddenly the Tuchuk bent to the soil and picked up a handful of dirt and grass, the land on which the bosk graze, the land which is the land of the Tuchuks, and this dirt and this grass he thrust in my hands and I held it.
The warrior grinned and put his hands over mine so that our hands together held the dirt and the grass, and were together clasped on it.
"What fool is this!" she demanded of Kamchak.
"No fool," said Kamchak, "but Tarl Cabot, a warrior, one who has held in his hands with me grass and earth."
"He is a stranger," she said. "He should be slain!"
Kamchak grinned up at her. "He has held with me grass and earth," he said.
"What," I asked Kamchak, "would you do if you thought the message were truly from Priest-Kings?"
"Nothing," said Kamchak, gravely.
"You would risk," I asked, "the herds the wagons the peoples?" Both Kamchak and I knew that Priest-Kings were not lightly to be disobeyed. Their vengeance could extend to the total and complete annihilation of cities. Indeed their power, as I knew, was sufficient to destroy planets.
"Yes," said Kamchak.
"Why?" I asked.
He looked at me and smiled. "Because," said he, "we have together held grass and earth."
"Friend," he had said.
"Friend," I had said.
We had then tasted salt, each from the back of the wrist of the other.
"Let there be salt between us," he said.
"Let there be salt between us," I said.
He placed salt from the small dish on the back of his right wrist. . . .
I placed salt on the back of my right wrist. . . .
I touched my tongue to the salt in the sweat of his right wrist, and he touched his tongue to the salt on my right wrist. "We have shared salt," he said.
He then placed in my hand the golden tarn disk, of Ar, with which I had purchased my instruction.
"It is yours," I said.
"How can that be?" he asked.
"I do not understand," I said.
He smiled. "We have shared salt," he said.
"What madness do you contemplate?" he whispered.
"Surely Zarendargar must be warned," I said.
"No!" said Samos. "Let him be slain as expeditiously as possible!"
"Once," said Samos, "he sent you forth upon the ice, to be slain by another Kur."
"He did his duty, as he saw it," I said.
"He might slay you, instantly, if he saw you," said Samos.
"It is true he is an enemy," I said. "That is a risk I must take."
"How is it that you could even think of doing this?" he asked.
"Zarendargar may need my assistance," I said. "I may be able to aid him."
"But why, why?" he asked.
I shrugged. "Once," I said, "we shared paga."
Cuwignaka's knife moved on his own forearm, and then on mine, and then on Hci's.
Cuwignaka held his arm to mine, and then I held my arm to that of Hci, and then Hci, in turn, held his arm to that of Cuwignaka. Thus was the circle of blood closed.
"It is done," said Cuwignaka.
"Brothers," I said.
"Brothers," said Hci.
"Brothers," said Cuwignaka.