Fast, caustic and superbrainy, this heavily fictionalized biopic of Facebook founder Mark Zuckerberg offers a portrait of the genius as (everyone in the movie calls him this) asshole. Zuckerberg as written by Aaron Sorkin and incarnated by Jesse Eisenberg, with a single-mindedness so cool as to be lunar isn't inhuman, exactly. He's more posthuman, a series of calculating algorithms. He is his own computer code complex and, to most of those who would know him, unfathomable. At 19, the Harvard sophomore is both wise beyond his years and a gawky adolescent. Director David Fincher brings a ruthless briskness to the task of steering this complex story of transcontinental entrepreneurship and overlapping lawsuits. The film is like a video game at warp speed but for the ear-brain coordination instead of the eye-hand. And the rewards for paying attention are exhilarating. The Social Network is a high-IQ movie that gives viewers an IQ high.