Ashoka was an Indian emperor of the Maurya Dynasty who ruled almost all of the Indian subcontinent from ca. 269 BC to 232 BC. One of India's greatest emperors, Ashoka reigned over most of present-day India after a number of military conquests. His empire stretched from present-day Pakistan and Afghanistan in the west, to the present-day Bangladesh and the Indian state of Assam in the east, and as far south as northern Kerala and Andhra Pradesh. He conquered the kingdom named Kalinga, which none of his ancestors had conquered starting from Chandragupta Maurya. He embraced Buddhism after witnessing the mass deaths of the Kalinga War, which he himself had waged out of a desire for conquest. He was later dedicated to the propagation of Buddhism across Asia and established monuments marking several significant sites in the life of Gautama Buddha. Ashoka was a devotee of ahimsa (nonviolence), love, truth, tolerance and vegetarianism.

Ashoka played a critical role in helping make Buddhism a world religion. As the peace-loving ruler of one of the world's largest, richest and most powerful multi-ethnic states, he is considered an exemplary ruler, who tried to put into practise a secular state ethic of non-violence.