John of Salisbury (late 1110s – 25 October 1180), who described himself as Johannes Parvus ("John the Little"), was an English author, philosopher, educationalist, diplomat and bishop of Chartres- wikipedia 
John of Salisbury, who described himself as Johannes Parvus, was an English author, philosopher, educationalist, diplomat and bishop of Chartres. - wikimedia
John's writings are excellent at clarifying the literary and scientific position of Renaissance of the 12th century. Though he was well versed in the new logic and dialectical rhetoric of the university, John's views also imply a cultivated intelligence well versed in practical affairs, opposing to the extremes of both nominalism and Philosophical realism a practical common sense.
He first coined the term ''Theatrum Mundi'', a notion that influences the theater several centuries later. In several chapters of the third book of his ''Policraticus'', he meditates on the fact that "the life of man on earth is a comedy, where each forgetting his own plays another's role".
John's writings are excellent at clarifying the literary and scientific position of Renaissance of the 12th century. Though he was well versed in the new logic and dialectical rhetoric of the university, John's views also imply a cultivated intelligence well versed in practical affairs, opposing to the extremes of both nominalism and Philosophical realism a practical common sense.