How would you react if someone told you that you were biased? What would you do if you found out that your brain was pre-wired to be biased? What if you learned that being biased was a matter of survival?
You and I are biased. We are all biased.

Our brains are pre-wired to use contextual cues to extract meaning. Our ability to distinguish between danger and safety, friend and foe are all due to our ability to extract meaning from contextual cues. We use these contextual cues to process the limited information we have and when the context is unfamiliar our brain fills in its own best guess. So despite our best conscious efforts, we can still possess negative prejudices and stereotypes which shape how we view different people and how we act in different circumstances.

Scientific research has shown that unconscious or implicit bias, which is often unnoticed, remains as "mental residue" in all of us. One's willingness to learn their own possible biases is essential to understanding the causes and mitigating its effects.

To learn more and assess your unconscious preferences for over 90 different topics ranging from ethnic groups to sports teams and from pets to political issues, visit Project Implicit:
https://implicit.harvard.edu/implicit/research/