The Golden Ratio is a staple of mathematics classes, art classes, and TOK textbooks. In this article by John Brownlee, however, he makes that case that the Golden Ratio is a load of rubbish.
. . . the idea that the golden ratio has any relationship to aesthetics at all comes primarily from two people, one of whom was misquoted, and the other of whom was just making s___ up.
Read the whole article here: http://www.fastcodesign.com/3044877/the-golden-ratio-designs-biggest-myth .
If you want more, YouTube has a lecture by a Stanford mathematics professor, Keith Devlin, about the Golden Ratio and Fibonacci numbers. Devlin is quoted by John Brownlee in his article. (The comments on the YouTube video’s page offer some interesting case studies in why people believe what they believe.)