He did miss my favorite argument. The oldest records on the reproductive rate of the US date to exactly 1776. The rate? 10. You might think that it would be prohibitively expensive to move things around without roads to the degree that we would be living resource scarce and in squaler, but somehow the earliest generations of Americans had means enough to feed all those mouths. When you study the history, the colonialists really did have material abundance and this isn't some k/R effect. Economies work just fine at their main purpose without huge public funding of roads.