An important Italian critic once gave Fistful of Dollars a very bad review when it came out. Then he went to the university here [Rome] with Once Upon a Time in America. We showed it to 10,000 students. And while the man was speaking that day to the students, with me present, he said, "I have to state one thing. When I gave that review about Sergio's films, I should have taken into account that on Sergio Leone's passport, there should not be written whether the nationality is Italian or anything else. What should be written is: 'Nationality: Cinema.' "

Even when I read a book, if the book leaves me the possibility of finding certain solutions or working on my own toward a solution, I prefer that much more than if the book fills me with the answers, gives them to me directly.

As far as commercials were concerned, I did very few, and I did them only when they gave me carte blanche to them the way that I wanted to. And I did them as an exercise, because I, who do very long films, never thought I would be able to tell a story in 30 or 40 seconds - you come across a whole new system and manner of approaching a subject.

I had more trouble than I had a sense of utility or satisfaction. But it served to occupy me and to keep me occupied in a field that I love - which was cinema - while I was waiting to realize the film that I wanted to do, which was Once Upon a Time in America, which took ten years of thinking and working to realize.

You see in Once Upon a Time in the West the whole film moves around her [Claudia Cardinale]. If you take her out, there's no more film. She's the central motor of the entire happening.

I had always thought that the 'good,' and the 'bad' and the 'violent' did not exist in any absolute, essential sense. It seemed to me interesting to demystify these adjectives in the setting of a Western. An assassin can display a sublime altruism while a good man can kill with total indifference.

I've always had the sensation that people in America are always avant-garde. Very attentive to all the new innovations. But it's very specialized.