From "Godfather 1" to "Godfather 2", Coppola recorded the transition of power between the two generations of godfather, and also recorded the struggle of the second generation of "Godfather" Al Pacino from a boy to a man. Marlon Brando, Al Pacino, Robert De Niro and Coppola are the three Godfathers of two generations. They are the integrators of typical American gangster films