One of the most influential business books ever written is a 1,200-page novel published 50 years ago, on Oct. 12, 1957. It is still drawing readers; it ranks 388th on Amazon.com’s best-seller list. (“Winning,” by John F. Welch Jr., at a breezy 384 pages, is No. 1,431.)

The book is “Atlas Shrugged,” Ayn Rand’s glorification of the right of individuals to live entirely for their own interest.

For years, Rand’s message was attacked by intellectuals whom her circle labeled “do-gooders,” who argued that individuals should also work in the service of others. Her book was dismissed as an homage to greed. Gore Vidal described its philosophy as “nearly perfect in its immorality.”

But the book attracted a coterie of fans, some of them top corporate executives, who dared not speak of its impact except in private. When they read the book, often as college students, they now say, it gave form and substance to their inchoate thoughts, showing there is no conflict between private ambition and public benefit.