The most important incident in Asoka’s reign was the Kalinga war The horror of the Kalinga war brought about a change in Asoka.
The change in his attitude that had taken place found expression ii the internal and external policies pursued by him subsequently Internally, Asoka made his administration benevolent and suited to ( the well-being of the people.
Both for material prosperity ant spiritual uplift of the people he spared no stone unturned. He introduced a universal code of social and religious behavior which he called Dhamma.
Externally, he gave up policy of conquest am initiated a policy of brotherhood. Also Asoka summoned the Thin Buddhist Council at Pataliputra to resolve differences among the Buddhists.