The purpose of the article is an investigation of socio-pedagogical positions of subjectness as an important basis for children and youth socialization, appreciating the necessity to form decision-making capabilities in young generation in the modern era and being a source of personal activity. Research methods were scientific literature analysis, synthesis, generalization, and systematization of scientific views. Research analysis allowed the authors to draw general conclusion about essential characteristics of subjectness as an important feature of children and young sociality in social transformationsera. Thus, subjectness phenomenon is considered as something that is not obvious, but needed to certain conditions for its manifestation. Such external conditions are social transformations, critical events, social situations; so, they require not trivial actions from the subject. The authors considered also personality conscious purpose and motive of activity by which the subject is included in work to be basic requirement for subjectness development in subject. Personality with subjectness has certain effective characteristics; one is the ground of activity, having the motive of such activity with a plan and ways for its implementation. Personality is interested in results, and carrying responsibility for them. The article advances the view that subjectness is not a permanent quality or subject characteristic. Such property distinguishes subjectness from sociality, since sociality is characterized by greater resistance and stability of existence in the personality integration. Acquired in childhood skills, strategy, experience of social interaction (language, etiquette, social taboos, traditions, mental and behavioural patterns, etc.) always remain with a person (except critical situations: loss of memory, severe mental illness, ets.). Subjectness is a socio-personal characteristic dependent on psychological, social, spatial, and temporal conditions; it can be seen as a situational manifestation of sociality reflected the quality and specificity of acquired human sociality. The authors proposed to extend concept of the major trends of sociality changes within society, separate social groups and subjects through the study of subjectness specificity during public transformations.