What do those countries have in common? People are killing each other or drive others out of their homes. Why is this happening? Very simple, in each of these, one group of people believes another group is different from them and dangerous to them. It has been thus through history. How different are humans from each other? We come in different colors: red, black, white, yellow and brown; we have a variety of political systems, social systems, religious views or none at all; We are different in mind, have different educational systems, different economic classes. We speak different languages, and have different customs and dresses. If we were to break each of these further, we would have quite a long list of qualities and characteristics that make humans appears to be different from each other. I say they appear to be different, because most of what have been listed stand for what we see or hear, not what is true of human. Man is man everywhere. It is only where he lives, when he lives there, with whom he lives there, and al the others that have effect on how he lives, that is, what he believes, what he wears, his customs, his language and so on. These are man-made facts that each group develops over tome, living together, facing the same problems, needing and desiring the same things. They are his culture. The truth is that we are much more same than different. If you wear one type of clothing and I wear another, we both wear some kind of clothing. Our culture demands it. If you speak one language and I another, we both speak so that others will understand us; we must communicate with each other. Nothing is gained by giving too many differences, but much is lost. If we understood our differences as the ones of culture, then we could make our world more peaceful. Differences does not mean better or worse, right or wrong. It means only that differences have been made by society. Differences produce variety of thoughts, work out human problems peacefully. From this passage it can be inferred that   _  .
Our world would be more peaceful if we understand and communicate with each other. People don't know how differences are caused. It is only differences that can solve man's problems. Man is man everywhere but not woman.