"In the original script, characters’ genders were explicitly interchangeable. This was a distinctly unusual feature for a sci-fi script at the time, and meant that the lead Ellen Ripley, the now iconic female action hero played by Sigourney Weaver, was never initially conceived of as a woman at all. This might explain why her behaviour doesn’t conform to the sexist stereotypes rife in 1970s filmmaking. Weaver also told the Independent in 2012 that Ripley was an expression of 1970s feminist insurgency: “Women were agitating to be in the army, to work in warehouses and as truck drivers.” Other than making room for a powerful female lead for the film, the gender-neutral script underlines something crucial about Alien’s horror: all human life is at threat. Audiences were already familiar with women as the targets of sexual assault, but Alien brought a new horror into the mainstream, a truly inhuman sexual attacker indiscriminate about its targets."