So who was the real "Genius"?
I felt that the film's subtext represented a play on the title: was the "genius" the author Thomas Wolfe (Jude Law) or the editor Max Perkins (Colin Firth)?
The movie does not provide a clear answer, and it gives both men their moments of genius or compelling and convincing arguments. But if anything, I would say that the film ultimately sides with Perkins—suggesting that sanity, selflessness, discipline, and balance ultimately make not just for better life, but for better art as well.
On the other hand, the movie indicates that you need originals and trail blazers like Wolfe, too.