Plutarch (46-120) - Greek biographer, historian, and philosopher, sometimes known as the encyclopaedist of antiquity. He is most renowned for his series of character studies, arranged mostly in pairs, known as “Plutarch’s Lives of the Noble Grecians and Romans” or “Parallel Lives.” Cato the Younger (75 AD) - A study of the life of Cato the Younger, a Roman philosopher and statesman.