Luciano Vincenzoni (7 March 1926 – 22 September 2013) was an Italian screenwriter, known as the "script doctor". He wrote for some 65 films between 1954 and 2000. Vincenzoni was born in Treviso, Veneto. He is probably best known in world cinema for his script writing of Sergio Leone's For a Few Dollars More (1965) and The Good, the Bad and the Ugly in 1966, but he also wrote for a number of other Spaghetti Westerns. He was capable on the business side of film making and his strong relations with popular and important people in the industry helped him to sell For a Few Dollars More to the European vice-president of United Artists. During the bargaining session, in front of Sergio Leone, he made an on-the-spot deal for the upcoming The Good the Bad and the Ugly, which was then just a vague idea in his mind at the time. Vincenzoni had started to develop the story all the way back from his earlier film, called La Grande Guerra (1959), about two Italian soldiers in World War I. The title, The Good, the Bad and the Ugly was his idea, which he created on the spot.

For more information press the link below:
https://en.wikipedia.org/wiki/Luciano_Vincenzoni