"How to Win Friends & Influence People"
This advertisement, written by advertising legend Victor Schwab, sold a million books in three years (by mail order) according to David Ogilvy's book "Ogilvy...View More
on Advertising". He described the promise of the headline & content of the copy as irresistible! This version of the ad is from February 1937. However, in September, just several months later, they altered it to include two forms of social proof which included the statement "More Than 500,000 copies Already Sold" as well as an impressive excerpt from the Reader's Digest about the book. They also tested variations of different case studies like the one included in this version, "The Case of Pat O'Haire". Supposedly, Victor Schwab not only wrote the ad, but created the title of the book as well as all the chapter titles.