It is a common feature of the treaties on international protection of economic and social rights that all states, regardless of their resource capabilities, are invited to ratify these treaties. Although all developing countries except Somalia have ratified the Convention on the Rights of the Child, the macroeconomic conditions of systemic poverty and underdevelopment in these countries indicate that there are concerns as to whether and how such states can really perform their legal obligations and guarantee the fulfilment of the Convention's economic and social rights. This article examines the emerging patterns of recent state practice in this area, with a view to identifying the contribution of international cooperation and assistance in these processes. The gist of the discussion presented here is that despite their macro-economic disadvantages, developing countries can accelerate the processes of achieving full implementation of economic and social rights if they have access to appropriate arrangements for external technical and financial cooperation and assistance. In view of this, it is suggested that there may be a legal obligation on the part of the international community to render such assistance and cooperation.