The article generalizes the range of approaches to subjectivity phenomenon research in terms of both classical and existential phenomenological traditions. The problem of subjectivity sources turns out to be quite topical from the point of interdisciplinary research because of the scientific community interest to the boundaries of mental space. In the context of social psychology and cultural anthropology, subjectivity of action is determined by ancestral generality thus assuming the analysis of deep processes in social and mental dynamics at the level of sense formation. Significance and constructiveness of philosophical analysis of subjectivity is demonstrated in the context of social anthropology focusing at bases of human action motivation.