One of the earlier of these theories belongs to Nicollo Machiavelli. Machiavelli’s formulation of diplomacy is based on his experience of serving as diplomat of Florence, his home city, until the fall of the republic in Florence in 1512. During his career Machiavelli took part in the foreign relations of Florence with both other Italian city-states and foreign countries. His theory of diplomacy can be read through his works The Prince, The Discourses on the First Ten Books of Titus Livy and The History of Florence. Another Florentine diplomat who has contributed to the theory of diplomacy is Francesco Guicciardini. The main theme in Guicciardini’s theory, which is generally outlined in his History of Italy, is the value of good ambassadors, which he sees as a source of prestige for the price. Hugo Grotius, who is a great opponent of war and deems it acceptable when it is just, and for this reason according to him diplomacy has a vital role. His work Three Books On the Law of War and Peace is the reflection of this approach. He defines three methods to accommodate misunderstandings among states without a war. French statesmen Richelieu has also formulated ideas on diplomacy. His theory of diplomacy can be derived from his Political Testament, in which he has penned political advice for Louis XIII. Having become the French prime minister in an age of continuous wars, Richelieu’s main concern was to establish peace and carry out peaceful relations with other states. The first significant diplomatic writer of the twentieth century is Ernest Satow. Satow owes his reputation in diplomatic theory to his book Guide to Diplomatic Practice, which was the first remarkable book in English language about the theory and practice of diplomacy when it was published in 1917. The correct answer is Choice B.