A rich family’s wedding erupts into violence in Michel Franco’s new film at Venice, a searing indictment of the gap between rich and poor and a wake-up call to the threat of authoritarianism.

“Nuevo Orden,”, premiering at the Venice film festival on Thursday, takes place in Mexico but the dystopia it imagines could take place not only there, with its 60 million poor, but in many countries around the world, Franco said ahead of the screening.