Why does racism exist?

Unconscious bias is when our brains receive constant streams of information about other people, and over time, the brain starts to construct a positive or negative bias towards individuals or groups of people, based on the messages it has received. This same principle applies to people, and more importantly, groups of people. See, we’re constantly receiving messages about people that, over time, does create a bias. Messages come from so many different sources; whether it’s the news we read, social media, music videos, the stories we hear, advertisements or even the movies we watch. They all have a role to play in perpetuating stereotypes.