The Social Network is a 2010 American biographical drama film directed by David Fincher and written by Aaron Sorkin. The film stars Jesse Eisenberg as Mark Zuckerberg, the co-founder, and CEO of Facebook, and chronicles the legal battles and the founding of the social media site.
The tagline text “You don’t get to 500 million friends without making a few enemies” on the poster is Futura by Paul Renner. Futura Medium and Futura Medium Oblique could be the specific weights/styles used. You can view details about the Futura font family here.