Final answer:
Puritans established colonies in the Americas mainly to practice Calvinist-based Protestantism without persecution by the English Church or Parliament, to create communities reflecting their religious ideals.
Step-by-step explanation:
Reasons for Puritan Colonization in the Americas
One of the primary reasons many Puritans established colonies in the Americas was to freely practice their Protestantism without fear of persecution. The Puritans and Pilgrims were Calvinists who sought to create a society based on their religious beliefs, which they felt could not be freely practiced under the Church of England's authority.
They desired to purify the Church of England or, as with the Pilgrims who settled Plymouth, to separate from it entirely. Factors such as religious freedom, the creation of a community aligned with Calvinist Protestantism, adherence to certain theological principles over the compromises of the Church of England, and the Puritan belief in the sinfulness of idleness all contributed to their emigration. In addition to religious reasons, economic aspirations, driven by mercantilist thought, provided a secondary motive for these colonial ventures.