If the Middle Ages are to stand in history books as the Age of Faith, it could be equally asserted that the nineteenth, twentieth, and twenty-first centuries will no doubt be remembered as the Era of Unbelief. Whereas unbelievers in the Middle Ages were careful in how they expressed their theological doubts for fear of befalling persecution, theists (be they Protestant, Catholic, or Orthodox Jew) have today learned selectivity in how they go about expressing challenges to the prevailing lack of belief impacting fundamental cultural institutions such as government, academia, and the scientific establishment.