A little preview, raw draft:
(A lot more detailed, statistically based integration of other sciences in depth explanation is coming in a book) 
And you would think Psychopath, Narcissist, and Machiavellianist would logically culminate into Sadist or other  (that is its own separate section) ....
Not necessarily 
(Delroy L. Paulhus & Kevin M. Williams, 2013 2D representation) 

As Sadism is deriving pleasure from sadistic acts 
Psychopathy,  Narcissism, and Machiavellianism for example is a way of life.... Not always happy with the way they are
And there is a myriad of other research questions.....

Their way of life culmination vs intimacy sadism
Often they suffer from depression, anxiety (and here it's important for others not to jump with psychopathy diagnosis on anyone, on  individuals with anxiety but rather carefully evaluate it using DSM-5 and why not DSM-6 ...and other.)
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