
It's Always Sunny in Philadelphia, created by Rob McElhenney, Glenn Howerton, and Charlie Day for FX, is the longest-running live-action comedy series in American television history, having aired over 16 seasons without meaningful decline in quality. Set in a Philadelphia dive bar run by five irredeemably selfish, stupid, and morally bankrupt friends, the show has consistently pushed the boundaries of what network television will permit a comedy to depict — its characters are racist, sexist, and utterly devoid of redemption or growth, yet remain compulsively watchable. It's Always Sunny pioneered the 'comedy of pure darkness' format that It's Always Sunny graduates have brought to subsequent shows.
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