Fossil fuels allowed the human race to operate… complex systems at gigantic scales. Renewable energy sources are not compatible with those systems an… - James Howard Kunstler

The total planetary endowment of conventional nonrenewable liquid oil was… two trillion barrels before humans started using it [and possibly more, as most of it was used to protect the Earth's crust]. Since the mid-nineteenth century, the world has burned through... one trillion barrels of oil, ...representing the easiest-to-get, highest-quality liquids. [...] Oil has enabled the [post-War] population explosion [and also enabled the public-health and feminist revolutions].

One final thing worth noting on the subject of rail: From 1890 to about 1920, American localities managed to construct hundreds of local and interurban streetcar lines that added up to a magnificent national system (independent of the national heavy rail system). Except for two twenty-mile gaps in New York state, one could ride the trolley lines from New England clear out to Wisconsin. The story of the conspiracy by General Motors and other companies to destroy the U.S. interurban system is well documented. The salient point, however, is how rapidly the system was created in the first place, and how marvelously well it served the public in the period before the automobile became established.

The American scene changed hugely in the 1920s. Modernity transformed everything from women’s clothing to the human imprint on the landscape. The car liberated rural America and began cluttering up the cities. The first tractors started a revolution on the farm.* Muscular American industry outinvented and outproduced all competitors around the world. Foreigners watched our movies and learned to play jazz. A sense of intoxication ran through Wall Street, prompting excessive risk-taking and wild speculation in any novelty, the participation of easily snookered, inexperienced investors buying stocks with borrowed money (“on margin”), unregulated investment pools that behaved like hedge funds do today, “bucket shops” that amounted to betting parlors, and a great deal of insider banking misconduct around financial markets that were hardly policed at all. After it all crashed in October 1929 the loss of confidence was epic. Decades later, scholars still puzzle over the cause of the Great Depression. It was a reality failure. The things that people believed in proved spectacularly unreliable, especially in the realm of money and other abstract paper extensions of it.