This work begins by explaining that we can ask into theories by looking at their "objective aspect," their "subjective aspect," or the "aspect of utility." The author distinguishes between "derivations," which are justifications for non-logical conduct, and the conduct itself or "residues," which can be divided into classes Â– he posits that Class 
This work begins by explaining that we can ask into theories by looking at their "objective aspect," their "subjective aspect," or the "aspect of utility." The author distinguishes between "derivations," which are justifications for non-logical conduct, and the conduct itself or "residues," which can be divided into classes Â– he posits that Class I residue types should be equally present with Class II types amongst the leaders, so that society is not ruled by all lions or all foxes, since this creates the possibility for "circulation of elites." FTP, name this really long treatise written as a systematic and scientific analysis ►of irrational human action, by Vilfredo Pareto.  
This work begins by explaining that we can ask into theories by looking at their "objective aspect," their "subjective aspect," or the "aspect of utility.
Mind and Society (or Trattato di Sociologia Generale or Treatise on General Sociology)