Diversity is nothing more than a difference from the majority. In any culture there is a majority and many minorities. Culture is a set of norms that set standards for a society of what is acceptable behavior.
In every culture there are basic standards for social interaction such as personal space distance, eye contact, amount of body language displayed in public, negotiating style, etc. In America, we stand about eighteen inches apart when engaged in normal conversation; prefer very direct eye contact; are pretty demonstrative with body language and negotiate very directly always asking the other party for their “bottom line”. In other cultures they may stand closer or farther than we are comfortable, may view direct eye contact as rude, be more or less open to displaying body language and negotiate more indirectly.