This chapter addresses the engagement of private subjects with sustainability and, in particular, the call for their responsibility. The term “corporate social responsibility” (CSR) became very popular and is understood as a modern label of a universally and generally applied self-regulating business model that helps a business (entity) to be socially accountable to itself, its stakeholders and even the public-at-large. However, even a cursory observation reveals a set of ambiguities and contradictions leading to questions about the CSR feasibility. Well, CSR is neither new nor “corporate” specific, nor necessarily self-imposed nor only accountability based. Legal entities engaging in business have long been a fact of life of European civilization, and the issue of their accountability v responsibility v liability has accompanied them through almost their entire history. Consequently, CSR has important historical and conceptual roots (Sect. 8.1) which need to be explored and appreciated before the engagement with the modern understanding of CSR launched by Bowen and visualized by Carroll (Sect. 8.2). However, CSR is very dynamic and so the static visualization needs to be complemented by the dynamics of CSR stages, phases and versions (Sect. 8.3) so as to appreciate what is the status quo of CSR (Sect. 8.4).