Maybe the racial apprehension in the article is driven precisely the fact that many Detroiters are only a couple of generations past being exploited by sharecropping [[or worse) in the south. People came up here for good-paying industrial jobs, not to scrape by at subsistence farming.
A couple of other questions/comments:
1. Did you mean "Antarctica" rather than "Australia?" Australia has indigenous agriculture.
2. The argument that people grew their own food on every continent is a bit of a stretch. The rural/urban divide has been acute for about 5,000 years, and cities [[if not empires) often imported the bulk of their staples from other places. Rome, for example, had no nearby large-scale agriculture and was heavily dependent on Spain [[other end of the same continent) and north Africa [[obviously a different one).
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