Calls upon the Economic and Social Council to examine in detail, and in the light of these considerations, the social activities undertaken by the United Nations together with the pertinent activities of the specialized agencies, in order to fulfil the various social tasks assigned to it by the Charter, and to take the necessary action to ensure that efforts and resources are effectively concentrated upon those social problems the early solution of which can be promoted through international action, especially in the under-developed countries, both self-governing and non-self-governing;