what are some examples of prejudice in the book?

"I remember hearing you once say, Mr. Darcy, that you hardly ever forgave, that your resentment once created was unappeasable. You are very cautious, I suppose, as to its being created."

"I am," said he, with a firm voice.

"And never allow yourself to be blinded by prejudice?"

"I hope not." (ch 18)

Darcy actually comes across as a pretty open minded guy for the times. He might even be the least prejudice character in the book!