He inherited the Sage's "eyes" — his powerful chakra and spiritual energy. He believed that force and strength were the key to peace. When the Sage was on his deathbed, he selected the younger brother to carry on his dream of establishing peace throughout the ninja world. The older brother, angry and jealous that his father had not chosen him, fought his younger sibling to claim what he felt was rightfully his. The elder brother's descendants, who would become the Uchiha clan, would continue this fight with the younger brother's descendants, the Senju clan.