Mr Jacoby's premise is that there is no limit to the Earth's carrying-capacity. In a finite world, this is a logical impossibility. I believe in the many scentists who know through study that there are limits to growth. Utopians like Jacoby are, I believe, very short-sighted, as are those who believe that we must increase immigration due to a declining birth rate. It is not necessarily a bad thing to cut down on consumption and learn to live with less.