The arrival of missionaries in Nagaland transformed Naga history. The conversion of the Nagas to Christianity was the beginning of many great changes in Nagaland.

Rev. Miles Bronson was the first missionary to the Nagas. He came to Namsang, a Naga village, in 1839. He started the first school for the Nagas. Another important missionary was Rev. E.W. Clark .He was the missionary to the Ao Nagas.

The progress of Christianity in Nagaland in the 19th Century was very slow as the attitude of the Nagas towards the missionaries was hostile in the beginning. Those who were converted to Christianity were persecuted by their clan and sometimes by the whole village.

But the activities of the missionaries were not merely confined to conversion. They carried out the social activities such as medical care and formal education. At the same time, when the concept of one God was taught to the Nagas, who believed in a number of spirits and had a religion with accompanying set elaborated rituals, they responded to the simplicity and the logic of the new religion. The so-called glory that the Nagas derived by hunting the heads of their fellow-men was replaced by a zeal for service to humanity.

Christianity indeed has been the single most dynamic factor in modernizing Naga Society. It opened the door for the Nagas to think in a global context and brought them into the fold of a world-family.

The Nagas, once known and feared for their head-hunting practices, were transformed into a modern society. Christianity uplifted the mental, spiritual and physical lifestyle of the Naga people.