For most of us, analyzing who is trustworthy or not, who can be a potential spouse or, on the contrary, a criminal or a psychopath, remains a very difficult task. The common person doesn’t really know how to detect psychopathic or sociopathic traits in others, and much less detect a highly moral and ethical individual. This difficulty creates challenges for recruitment processes, for finding an ideal business partner, and much but much more. Our humanity and the future of the world, to a great extent, depend on our ability to be precise and effective in the analysis we make of others, while detaching ourselves from our prejudices and fobias. In this sense, this scientific approach to the evaluation of the personality is what this books proposes, by being based on the most advanced researches on this topic.