The Descent is a good horror film because it exploits the most common human fears; death, claustrophobia and isolation. It does it while exploring human dynamics, specifically in survival mode. It shows the dilemma between cooperation and individualism.
This movie is also all about female empowerment: these women exist outside of the patriarchy and they are portrayed as completely independant from male figures. They are strong and skilled characters. They defy a lot of female stereotypes and that must be why I like the film so much.
The film depicts post-traumatic stress disorder authentically as well. The protagonist has recurrent nightmares, flash-backs. The actress manifests anxious behaviors.
Plus, it's also visually pleasant; at one point the protagonist as her body…