Their leaders use mind control and subliminal coercion to keep everyone in line. They tried it on a space marine once. Couple hundred Tau I think tried to invade his mind to understand him and humanity. Searching for information trying to break him. Once the marine realized how many of them were in his head he did his duty and forced both of his hearts to stop taking everyone that was in his head with him.
Their leaders use mind control and subliminal coercion to keep everyone in line. They tried it on a space marine once. Couple hundred Tau I think tried to invade his mind to understand him and humanity. Searching for information trying to break him. Once the marine realized how many of them were in his head he did his duty and forced both of his hearts to stop taking everyone that was in his head with him.