From Sondheim's LOOK, I MADE A HAT (sorry, I cited the wrong book above), p. 111:
(Gilbert's play) "turned out to be the story of a disillusioned Vietnam veteran who, urged on by a mysterious and symbolic figure called the Fat Man, becomes a presidential assassin. In between episodes in the protagonist's journey were quotations from some of the assassins who had targeted presidents throughout our history, and the opening scene took place in a shooting gallery...."
So Sondheim and Weidman took (a) the title and (b) the idea of opening in a shooting gallery. Neither a title nor an idea are copyrightable, so there's a strong legal argument to be made that they didn't have to give Gilbert ANY credit. However, we'll all agree they did the honorable thing.
But the musical we all know as ASSASSINS is "based on an idea by", which is not the same thing as "based on the play/novel/film". It is NOT an adaptation by any fair definition of the word.
(ETA bobby, thank you for sharing Gilbert's comment on the subject. Understandably, he sees the Sondheim ASSASSINS in terms of what is similar to his own play. But most of what he mentions (projections?) were likely to turn up in any treatment of the theme.)
Updated On: 2/3/12 at 05:09 PM