What were two main factors that led to the pilgrims to leave england and settle in america ?

In the early 17th century, thousands of EnglishPuritans settled in North America, mainly in New England. Puritans were generally members of the Church of England who believed that the Church of England was insufficiently reformed, retaining too much of its Roman Catholic doctrinal roots, and who therefore opposed royal ecclesiastical policy under Elizabeth I of England, James I of England, and Charles I of England. Most Puritans were "non-separating Puritans", meaning that they did not advocate setting up separate congregations distinct from the Church of England; a small minority of Puritans were "separating Puritans" who advocated setting up congregations outside the Church. The Pilgrims were a Separatist group, and they established the Plymouth Colony in 1620. Non-separating Puritans played leading roles in establishing the Massachusetts Bay Colony in 1629, the Saybrook Colony in 1635, the Connecticut Colony in 1636, and the New Haven Colony in 1638. The Colony of Rhode Island and Providence Plantations was established by settlers expelled from the Massachusetts Bay Colony because of their unorthodox religious opinions. Puritans were also active in New Hampshire  before it became a crown colony in 1691.