The correct answer to this open question is the following.
The causes of the sources of discord in early New England were basically the Kings Philip War and the Halfway Covenant. Both were the most threatening for the New England colony could have been handled better.
The Halfway Covenant was the solution implemented by the Puritans in New England in 1657 to baptize children to be members of the church and could have political rights. This decision created controversy and some colonists opposed it. They thought it was not the correct way to convert people to be part of the Church. The Covenant was discarded at the beginning of the great awakening.
The other major problem was the Kings Philip War, also known as the First Indian War, that started in 1675 and ended in 1678. The Native American Indian tribes of New England fought for their lands and privileges while English colonists and some Indian allies tried to settle in different territories to work the land. The war ended when both parts signed the Casco Bay Treaty that formally ended the hostilities in April 1678.
