"The dumbing down of American is most evident in the slow decay of substantive content in the enormously influential media, the 30 second sound bites (now down to 10 seconds or less), lowest common denominator programming, credulous presentations on pseudoscience and superstition, but especially a kind of celebration of ignorance."To his credit, Carl Sagan refused to sign the infamous 1975 "Objections to Astrology" article endorsed by 186 scientists on the basis that the signers relied on their collective authoritarian tone instead of arguing whether astrological principles are faulty. Yet Sagan ignored his own criticism when he later condemned astrology in the Cosmos TV series and in The Demon-Haunted World. Sagan had a less than rudimentary understanding of astrological principles and practices and he never engaged in the only type of argument he declared was credible.
Hypocritically, Sagan attacked newspaper horoscopes (the 30-second sound bite he was critical of) and the most superficial aspects of astrology as if that were all that astrology offers. Sagan's public trivializing of astrology was in fact a striking example of his own considerable contribution to the "slow decay of substantive content in the enormously influential media". It was nothing less than his own appeal to credulity and celebration of ignorance.
In hindsight, it almost seems as if someone influential in Sagan's life correctly warned him not to sign the Objections article but was not around to stop him from making the same rational blunder at other times.