The Age of Reason, also referred to as the Enlightenment was a very well known and appreciated era for many technological and other forms of advancement. The Enlightenment was a great intellectual movement. The advancements that took place, for the most part, were very beneficial, though there were some concerns that came along with the many new found discoveries. In terms of the science and technological advancements, the most prominent concern was secularism. The term secularism is defined as a belief system that rejects religion, or the belief that religion should not be part of the affairs of the state or part of public education. This general idea of the separation of the old and more traditional ways to reason and logic was very controversial at this time.