Not a lot of directors can be said to have created an entire genre, but it's especially true of George A. Romero, the incredibly influential horror director who died today aged 77.
His 1968 classic Night of the Living Dead established what we know as zombie horror, which currently enjoys more of a presence in pop culture than ever before thanks to the success of films like World War Z and TV shows like The Walking Dead, amongst countless other projects.
Although there have been several evolutions of the modern zombie genre, it can all be traced back to Romero's 1968 film and its two sequels, Dawn of the Dead (1978) and Day of the Dead (1985). All three films have been remade, some more than once.
Despite being almost singularly responsible to the zombie-centric pop culture world we currently live in, in many ways Romero's strongest legacy is how he successfully laced social commentary into his movies, starting with Night of the Living Dead, whose black leading man Duane Jones lent the film a tangible allegorical power.
Romero showed how much could be gained from putting some thought political into the horror genre, and it's an aspect of his filmography that continues to inspire.