self-righteousness; self-justified
独善的な態度は周囲との摩擦を生みやすい。
A self-righteous attitude easily creates friction with others.
独善に陥らず他者の意見にも耳を傾けるべきだ。
One should listen to others' opinions without falling into self-righteousness.
彼の独善が組織の分裂を招いた。
His self-righteousness led to a split in the organization.