Please correct my essay

“Why do you think that many people do not socialize with those who have a different racial background than their own? Think about possible reasons for this phenomenon, and what sort of results keeping to one’s own racial group can have for society. Remember that there can be both positive and negative effects when races don’t mix.”

For thousands or may be million years ago, people used to live in separate groups around the world. They didn’t have the communication technology as we already have it now, they have been lived in absolute different cultures.Now, after the human development, cultures start contact each other.

Every being on this planet, whether fish, bird or mammal, has a preference for its own kind, and defends its territory against real or not real threats. It's a common theme, people do tend to naturally gravitate to whom they are most like, and loathe of everything is not consistent with.

 Sometimes it is the sense of priority or feeling of superior, specialy when the other side came from a backward society. Sometimes this sense is involuntary and not known cause. It passed down in families, in cultures…not examined.

The different racial occasionally, lead to the racism which it give rise to increasing of crimes and destroy and disruption of community development.
Some people, in spite of being brought up with the idea that all people are equal, they are racist. It is insecure and lack understanding of other party.

In other side, specially from the viewpoint of medical, they find that the mixing of race is produce more healthy society because, “as everyone knows” that repeated mating within the same race lead to the emergence of diseases appear only in one race.

More over, the community consisting of different races help to develop society, and benefit from the traditions through the exchange of expertise and fill gaps that may be present in one of them.

Educational significant role in deepening the sense of this assistance or to get rid of it. I think that schools where students of different races helps to accept the issue of co-existence.
If the system continues, after several generations, we will find communities become more homogenization, and the sense of ethnic will disappear because every one will know that he came from the same type that the other came from.