This paper aims to provide a theoretical approach of Corporate Social Responsibility (CSR) in order to assess whether CSR will develop as a concept pushing efficiently for more de facto social responsibility or will become a pure marketing artefact. The trade-off between the development of CSR behaviour and lobbying over regulations is a key element that will influence the evolution of CSR. The result is that if the world consolidates or if it tends towards multilateralism to a large extent, then CSR is less likely to have an efficient impact.