Just in case you're not being rhetoric....
John Galt is a character in Ayn Rand's novel Atlas Shrugged (1957). Galt is acknowledged to be a creator, philosopher, and inventor who symbolizes the power and glory of the human mind under capitalism. He serves as a principled counterpoint to the collectivist social and economic structure depicted in the novel.
But perhaps you asked the question as this is part of the novel... in that case, forget it.
If you wonder about the literary value in Rand's writings, don't. They are rubbish in its purest form. Most of the present economic debacle is based on her ideas, implemented by clowns such as Alan Greenspan, who was a disciple of hers... so go figure.
cheers!