structural:scholar_edition
Advancements in technology

In the US of the 1930s, one farmer could produce only enough food to feed three other consumers. A modern farmer produces enough food to feed well over a hundred people. However, some authors consider this estimate to be flawed, as it does not take into account that farming requires energy and many other resources which have to be provided by additional workers, so that the ratio of people fed to farmers is actually smaller than 100 to 1.