Morton Prince,
The unconscious
(1921)
“ Similarly the instincts of acquisition and self-assertion are not satisfied and their urge persists until their ends are gained—the acquisition of certain objects in the one case and self-display or domination of other individuals or situations in the other case. Obviously the instincts and other innate dispositions have a biological significance, ontogenetically and phylogenetically, in that they serve the preservation of the individual and species and the perpetuation of the latter. And obviously in the drive to satisfy their aims they determine and govern behavior. ”
