This paper is focused around the concept of social exclusion and its underlying factors. Social exclusion-just as its opposite, social inclusion-is seen as a relationship between an individual's life course and society. In modern society, this relationship becomes ever more complex, increasing the probability of social exclusion. This complexity will be discussed from the viewpoint of socialization of young people. Education, employment, and citizenship are regarded as fundamental determinants of social exclusion. This paper constructs a novel theoretical understanding of the phenomenon of social exclusion and its pedagogical counterforces within the framework of social sustainability through philosophical conceptual analysis. The problem field is based on the example of Finland, where social exclusion of young people has become an important issue in political debate, despite the population's extensive social rights. In conclusion, the importance of holistic-systemic modeling is highlighted as a foundation for an integrated and coordinated system of political and educational interventions. Pedagogical counterforces against social exclusion are discussed particularly in the light of the concept of social sustainability.