If there's one thing Scorsese's Goodfellas has over The Godfather, it's that the former film is based so closely on real life events and first-hand accounts of Mob life that it gains the edge over the latter in terms of authenticity. Of course, that statement can be argued until the cows come home, but there's more than just one example of how a gangster film can gain huge acclaim due to being semi-biographical, with one such example being Bonnie & Clyde. Arthur Penn's 1967 film, while not an exact chronicle of the lives of Bonnie & Clyde, still shocked audiences with its (at the time) gratuitous violence and supposed glorification of murderers. At the time of its release, Bonnie & Clyde was heavily criticised by reviewers for such graphic depictions of violence, but gained widespread adoration by certain audiences who championed its reluctance to censor the crimes of the duo.