A Family Guy fan theory reveals the dark origin of Brian Griffin, and it's both intriguing and entirely plausible within the show's own story. FamilyGuy started out as a relatively unremarkable animated comedy with a heavy reliance on cutaway gags, but after finding its feet it quickly became one of the most successful animated TV shows of all time. Over the years, Family Guy's central characters have evolved, changing with the times in order to remain relevant to modern culture.
One of Family Guy's most grounded characters is actually not human at all. Brian Griffin the only non-human member of the Griffin family, but his personality is no less human than any other character on the show. Based loosely on Family Guy creator Seth MacFarlane, Brian's distinctly human nature is at odds with his canine appearance. Though the show often plays this up for comedic purposes, it's deliberately kept as one of Family Guy's biggest mysteries.
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However, one theory posted to Reddit suggests a clear in-universe explanation for Brian's apparent humanity. According to the theorist, Brian is most likely a CIA genetic experiment, and this explains why his personality and mind are those of a human while his body is that of a dog. The theory draws on evidence from Family Guy and American Dad!, making it surprisingly convincing.
From Family Guy's very beginnings, Brian has been a significant part of the show. His character has actually changed relatively little over the course of Family Guy's run: Brian has always been a talking dog living in a human world, and it's rarely ever brought up in service of anything other than jokes at his expense. However, according to
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