EALTH CARE ORGANIZATIONS should try to meet priority health needs, in third and fourth world nations as well as in industrialized nations, as effectively as possible and by fully utilizing all resources that are available. This assertion seems quite obviously to be valid, and most authorities would accept it as an ideal to be aimed for. But they would tend to lose themselves in endless arguments about which health needs should be given highest priority, and how best to mobilize existing resources and institutions in order to provide the kind of health care which they believe to be necessary. It is quite evident, in point of fact, that such an ideal has rarely if ever been realized, in any nation, anywhere, anytime. Not only does health care fall short everywhere of this ideal, it falls tragically short of even the barest minimum of attainment among most of the peoples in most nations of the developing world. Why is this so, and must it continue to be? The answer to these questions usually goes something like this: health problems in the poor nations are so great and resources to meet these problems along conventional Western lines are so meagre, while the populations in these nations rapidly continue to grow even greater, that little more can be expected beyond what is already being done or not being done -until economic development can catch up and permit the propagation of our way of life, along with our systems of health care-or lack of systems into the rest of the world. Such an answer, I believe, is not only cruel and unacceptable, it stands in the way of real progress toward practical solutions which would be possible within present constraints, if it were not assumed that we already know what constitutes health care and if we would not be afraid to vigorously explore fresh and imaginative approaches to the problem. Nearly three-fourths of the world's population live in third and fourth world nations. Of these, about three-fourths still live in rural regions with rudimentary sanitation, precarious food supply, and little or no access to the simplest health care which we have come to take for granted. Large numbers of the remaining one-fourth of the people of the poor nations, dispossessed from the land and hoping to improve their lot, have migrated to the larger cities, with more migrating every day, where most of them live huddled in slums and shantytowns, with sanitation often worse and food more expensive than in the villages they left, and with modern medical care usually in close proximity