This 2004 advertising pitch deck, unearthed by Digiday, is from the era depicted in the film The Social Network. As the film details, Eduardo Saverin was keen on monetizing "TheFacebook" from the early days via advertising, but Mark Zuckerberg was more interested in growing the company as fast and as much as possible.
As the deck illustrates, TheFacebook was very much conceived as an academically focused enterprise. Rather than being described as a social network from the get-go, it's instead marketed as an "expanding online directory that connects students, alumni, faculty and staff through social networks at colleges and universities." There was no hint that the network would ever expand beyond that focus. The plan was to "expand to include most of the schools in the United States."