Can there be such a thing as a universal human science in general?

Yes, the scientific study of the nature of man has it in both individual disciplines and a total given. The anthropology was asleep in the last decades of the last century due to some theories, but then experienced a renaissance. Of course, anthropology is a science, the major problems is to arrive at objective facts. Because even if the same test in all countries carry out in order to obtain comparable results, the results can be distorted. Since first the test created by certain people were, perhaps unconsciously, to assume their own ways of thinking, 2nd the interpretation of test results may be influenced by the evaluator. These problems one is conscious.

Man "in itself" - that I can best be understood as the "free", the most independent people. A depraved man who grew up with security is badly injured and develops below its potential. Therefore, man can not be viewed without the conditions of his upbringing: parental love, loyalty, support, security, etc. language, communication and expression in a broader sense, ability to social behavior, knowledge acquisition, etc. are added as a potential, their development and as much as possible already exhausted all the society and culture in their specific forms require. Therefore, an anthropology to make broad statements that involve actually everything: biology, genetics, education, social, economic and technological history, culture, just everything. To what extent can we then come to universal statements, in turn, may help clarify the comparative meta-studies of people in their specific living conditions.

As a universal human science is at all possible? (As nursing science is that even possible?) I do not think it very possible to establish a universal human science, the human being "in itself" is a purely imaginary object, which are good but hardly a scientific investigation. One would have to ask: What makes a man really a man? - And the answer to this question should be: The socialization that he's been through. Just the practices and preferences in food intake are so culturally determined, that a European probably never imagined could take a fermented egg itself, as do the Chinese like, and the Chinese think of hardly could, fermented milk themselves to take. Of course, we can obtain knowledge about the human being, since ancient times in many cultures around the same be said about people and about life. - Whether it but also a science, so one is systematically arranged according to principles of knowledge built up knowledge building can be, I think is highly questionable.