The Puritans feared what they could not explain, especially unexplainable things in the Bible. They also feared famine, insurrection and diseases. They commonly feared Satan, the devil, who they believed was everywhere. But, most especially, they fear God. Due to their belief that the devil was everywhere, trying to destroy them, Puritans became more paranoid and superstitious.
Um so the plentiful harvest one helped with the ancient civilizations ability to have large populations cause of the food and the need materials to live
