Please correct my new essay.

I have rewrote my essay again.please correct it.
Everywhere you go, everywhere you look, there is always somebody different. Differences in our society are often discussed. Many people do not socialize with those who have a different racial background than their own because of several reasone,sometimes it is racial prejudice the felling of superiority . Sometimes it is a feeling passed down in families and in cultures not examined. Sometimes this sense is involuntary and not from a known cause.

There are biologically fixed races; different races have different moral, intellectual, and physical characteristics. This is the ideal that many people engage in consciously and the way some people think without even realizing it.

The positive aspect of races socializing with other races is developing society by add new things like food and new ideas, it is found that the mixing of races produce more a healthy society because, “as everyone knows” that repeated mating within the same race leads to the emergence of diseases that appear in one race.For example Thalassemia, which it is an inherited disease.

In the same way,there is a nagetive aspects for this situation,It is sometimes lead to the racism which gives rise to increasing of crimes and destruction and disruption of community development.

I think it is important to study other cultures because later in life, you will be prepared to deal with people from other cultures in your jobb or in life.
Studying other world cultures will also teach you to become more tolerant and understanding of the different lifestyles, ideas, and behaviors of people. By studying other cultures, you will develop a well-rounded personality.

The continuance of living the different race in the same social tend to,after several generations, an homogeneous communities,and the sense of ethnicity will disappear because everyone will know that he came from the same (mixing) race.