Recent research has found that the the part of the brain that involves emotions, matures in adolescents well before the frontal lobes, which are involved with higher-order thinking.

Amygdala

Explanation:

Amygdala is the part of the brain. It is a very important part of the brain that is integrated with emotions, behavior, and motivation. It is an almond-shaped structure that lies in the brain. In a person, there are normally two amygdala presented. It has been considered that it is the part of the limb system that is responsible for the instincts and memory. It is responsible for the perception of anger, anxiety emotions, sadness, and control of aggression.  

Thus in the above context amygdala is the part of the brain that involves emotions such as aggression, anxiety, and high order thinking.

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.

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