Dr. Wilhelm Wundt

Psychology is as much a social science as a natural science; humans are most intelligent animals of the planet Earth, that s why they command the others.  This is our clasification within the Animal Kingdom:

Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Family:	Hominidae
Genus:	Homo
Species:	H. sapiens
Subspecies:	H. s. sapiens
Trinomial name
Homo sapiens sapiens

http://en.wikipedia.org/wiki/Human

Since birth humans begin to learn and to relate to other persons, creating bonds through social interaccion; then Psychology is, too, a social science, as well as a natural science.

The content of Psychology are not opinions or common-sense explanations but research-based knowledge.  Everybody is entitled to have opinions about humankind, but they are not scientific and, hence, can not be in a Psychology book.  This is the cicle of enquiry for any science, including Psychology:


"There are four elements in the cycle of enquiry:

1. Psychological research starts with the framing of appropriate, answerable questions.
2. The answers to these questions are claims. These claims have to be clearly identified so that they can be thoroughly assessed.
3. Assessing claims requires the amassing of information called data. The word ‘data’ is a plural word for the building blocks that make up the evidence that is presented in support of a claim.
4. The evidence then has to be interpreted and evaluated. The process of evaluation often generates new questions to be addressed as well as providing support for, or disconfirmation of, the original claims."    (Open University)
   
   
   The origins of Psychology are Philosopy, Biology, Physiology, and the date that has been accepted for its own beginning as a separate science is 1879, when german doctor Wilhelm Wundt opened the first psychological laboratory in Leipzig, Germany:
   
   
   http://en.wikipedia.org/wiki/Wilhelm_Wundt
   
   
   So, Dr. Wundt is considered one of the founders of the new science; the other three are Dr. William James, American; Charles Darwin, British naturalist researcher; and Dr. Sigmund Freud, Austrian.    (Open University)