Two key differences between the generations that Hanson chronicles are increasing urbanization and increasing dependence on government redistribution of income to provide a buffer against the sort of vicissitudes that made country people wonder if they would eat. That latter was the upshot of the Great Depression, rather like treating a toothache with heroin. It's effective enough but when the toothache goes away the heroin habit remains, and so has the dependence on redistribution of income. The difficulty is that it really does provide such a buffer and that we have become so accustomed to it being there that absence is regarded as intolerable hardship. This is certainly true under the social democracies in France and Germany - the evidence is now undeniable - and the comfort level that resulted appears as addictive as a heroin habit and just as impossible to maintain.
I do not think a return to the days of uncertainty and widespread famine is necessarily either the answer or the picture of a better world, but inasmuch as the present nanny state appears to be unsustainable there is certainly room for a few better ideas. Unfortunately the Democrats appear only to offer more of the same. Socialism didn't work so let's try more, central planning didn't work so let's try more, regulation didn't work so let's try still more - at some point you can beat a dead horse into moving but it doesn't mean he's going anywhere.
Although there doesn't appear to me to be any particular theoretical justication for it a middle course between Randian laissez-faire and stifling social democracy has built the most free and successful society so far, a phenomenon that has only given rise to accusations of theft on the part of the less successful and envious. It is actually nothing of the sort. It is certainly untidy, untheoretical, ad hoc and disagreeable to the sort of mind who likes things all tied up in pretty packages with bows around them. These feel that they can command prosperity and force it by undoing a theft that never was. And they have found that offering this makes them electable. And it isn't just the Democrats and certainly not just the Americans.