As I understand it, the avian studies that were the basis of the egg-thinning hypothesis were conducted on the basis of having a shortage of phosphorus in the bird diets. They could only have lain thin shells. Other demonstrations of the safety of DDT established no harm to humans. The lives saved by use of DDT were in the millions. The deaths occasioned by the ban on DDT were greater. But, of course, the lives saved would have been African blacks, for the most part. Or Hindu Indians. Or southern Asians. Does this imply a kind of reverse targeting? Suspend protection from those you wish to diminish?