Independent Scholarorries come in two flavors-the bitter lemon of private fears; the sour W apples of public concern. Private fears of illness and loneliness, loss and failure, death and purgatory are universal. Public concerns arise and recede, occur, and reoccur. A recurrent set of public concerns revolve around our numbers and our sustenance: are we too many, will there be enough, is there too much, will humankind, indeed, any kind survive?I am a child of the great depression and a youth of the great second war. I came to adulthood as new public concerns dimmed the bright hopes of the great peace: the cold war, the difficult struggles for independence, hunger and poverty, and, overall, the nuclear holocaust. But amidst these dominant concerns, a specific set of questions arose to set the agenda of many, enough, and too much. Can our population continue to double and redouble within our and our children's lifetimes? Will there be food enough to feed the many, material sufficient for their needs and desires, energy adequate to move them, to raise their food, and to transform the materials that they need? Will the transformation of energy and materials impose incommensurate burdens on human health, habitat, well being, and our life support systems of nature and earth?