People of Ideas: The Master List Ancient Greece (1500 to 300 BC) Hellenist and Roman Times (300 BC to 300 AD) Judaism (1000 BC to 70 AD) and Early Christianity (30 to 450 AD) The Middle Ages (450 to 1400) The Renaissance and Reformation (1400 to Mid 1600s) The European Enlightenment (Mid 1600s to Late 1700s) The 19th Century The First Half of the 20th Century The Second Half of the 20th Century: The Philosophers The Second Half of the 20th Century: The Scientists The Second Half of the 20th Century: The Theologians