I believe that it is a natural human condition to be biased. Everyone is born with that ability. From an early age we learn or seem to instinctively know how to like and dislike certain things. Most children dislike vegetables and love sweets. Not too long after we start to like or dislike some people who may or may not meet our expectations. As we become adults we really show our bias against other ethnic groups based on their background or the color of their skin.

As proof, take a sample of clear bias from the Bible. Samaritans were disliked by the Jews. At least they did not associate with them.

And about 60 years ago a more specific and horrific experience of bias was evidenced in the 2nd World War. Millions of Jews were murdered and tortured by the infamous Adolf Hitler.

In modern times, minority groups experience prejudice (bias) in one way or another.

Any individual who claims they are not biased is most likely simply not aware of his prejudice and is denying it. It does not make him or her unbiased!

I do not think that humans can change their natural inclination to be biased.