You should never talk about politics, religion, or sex in polite company, advised Emily Post in “Etiquette in Society, in Business, in Politics, and at Home.” Released in 1922, the guide by the American author and socialite sought to give readers the tools to navigate any social situation.
The upper echelon of British society has its own rules and customs, and MGM+’s new six-part espionage limited series “A Spy Among Friends” is as much about what happens when someone steps outside of class hierarchy as it is about Cold War subterfuge.
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