The Harvard Lampoon debuted in February 1876 and is the world's longest continually published humor magazine. Written by seven undergraduates and modeled on Punch, the British humor magazine, the debut issue took the Harvard campus by storm. President Ulysses S. Grant was advised not to read the magazine, as he would be too much in stitches to run the government. Harvard Lampoon alumni include comedians Conan O'Brien, Andy Borowitz, Greg Daniels, Jim Downey, Al Jean, and B. J. Novak. Lampoon alumni write and have written for Saturday Night Live, The Simpsons, Futurama, Late Night with David Letterman, Seinfeld, The League, NewsRadio, The Office, 30 Rock, Parks and Recreation, and dozens of other shows. The Lampoon has also graduated many noted authors, including George Plimpton, George Santayana, and John Updike.