How is Poe a political author?

From the text:

Or here’s someone whose stories you may not have thought of as inevitably political: Edgar Allan Poe. His tales “The Masque of the Red Death” (1842) and “The Fall of the House of Usher” (1839) both deal with a stratum of society most of us only get to read about: the nobility.

In both of these tales Poe offers criticism of the European class system, which privileges the unworthy and the unhealthy, where the entire atmosphere is corrupt and decaying, where the results are madness and death.