What's a movie that changed your life?

Arlington Road. It made me realize that anyone is capable of being a monster. We are so trusting of strangers and neighbors. That movie made me look at people differently. Everyone is a potential terrorist, pervert, serial killer, mass shooter, racist, rapist, etc...until i find out different. Do you ever think about the fact that your neighbor could have a slave hostage in their house, or be living in a house of horrors, or have bodies hidden in their house, or be a terrorist sympathizer?