Why would someone like anthropology?

Why would anyone like anthropology? In other words, why someone would be curious group and individual long-term lifestyle has nothing to do with their lives? If only psychological adventure, let me say, why will it as a part of their life, and a professional, to study it?
"Tropical depression" is the work of Levi-Strauss in 1953. In which he described his reasons in anthropology (of course, it is because he made structuralist philosophy and famous): "Anthropology is between the social sciences and material science to build their field of study: Anthropology think the only human limiting factor is space, there are all kinds of human beings to change the Earth experienced on the geological history of the meaning given meaning, and this meaning is over the number of them ...... unknown, even unknown society, accumulated countless era continued constantly result of the hard work of anthropology brought me to meet the intellectual: as a historical, anthropological history of the world and my own history of these two extremes are linked, thus indicating the presence of both common grounds anthropology to the study of human as its goal, so I was able to relieve doubts, because of various differences and changes between human and human anthropology research has significance for all mankind, without research unique to one single civilization unique things those special things under the watchful eye of foreign observers have disappeared into nothingness, no longer exists. Finally, anthropology Enough that I mentioned earlier is always vibrant, deep destructive taste, because anthropology provided me a bunch of ever actually endless research materials, customs, etiquette and style of many systems, research is always incomplete. "
the question is:
1. from the geo-spatial and material science (including race, etc.) to explain the perspective of social development, as well as revealing what position occupy a civilization in world history, what is the difference between the mean and sociology general? Or, sociological research called mainstream society?
2. Since it is a comparative study or social, should be compared on an equal dimension. Why even these classics to depict alien also makes people feel pain, trivial and overwhelmed it? Because of the lack of a clear description of the social structure. Anthropologists often in-depth local, will be able to observe things to fall into place record, a unique ethnographic value, but this is only a base material; their real value, should be horizontal and vertical comparison of different civilizations throughout the world in in the apparent.