E. W. Burgess, Introduction to the Science of Sociology
“ Everything now which is present in the individuals—the immediate concrete locations of all historical actuality—in the nature of impulse, interest, purpose, inclination, psychical adaptability, and movement of such sort that thereupon or therefrom occurs influence upon others, or the reception of influence from them—all this I designate as the content or the material of socialization. In and of themselves, these materials with which life is filled, these motivations which impel it, are not social in their nature. ”
