The phenomenon of “research ethics” was mostly resulted from the revelations regarding the appalling medical experiments conducted by some Nazi doctors in German concentration camps during the World War II. For example, they “killed Gypsy twin teenagers in order to determine why some of them had differently colored eyes. Prisoners of war were forced to drink seawater in order to find out how long a man might survive without fresh water.” As a result of such experiments, firstly, the Nuremberg Code of 1947 was developed to outline some basic ethical principles (e.g., informed consent, avoiding harm, respecting privacy) that were anticipated to guide medical experiments. The Nuremberg Code is the most important milestone in research ethics. Because the ethic codes developed in different areas of social sciences were based on the Nuremberg Code.