|The Mary Tyler Moore Show|
"The Mary Tyler Moore Show was the first to make a subject out of a single woman’s romantic life. Moore’s character, Mary Richards, was thirty and didn’t have a steady boyfriend. She was initially going to be a divorcee, but the head of CBS programming balked at the idea. ... Instead, Mary Richards became someone who was just ending a long-term relationship with a live-in boyfriend. To Burns and his co-creators, there was an exciting realism and urgency in
the idea that people have these long affairs with the man or woman they think will be the love of their life, and it turns out not to be, and they end up alone again, which became the overriding issue, I think, on the show. This woman who finds that she’s not alone, that she’s got this family of people whom she works with.The idea of being not-alone even when your relationships and dates end in shambles—this would become not only the overriding issue of The Mary Tyler Moore Show, but of pretty much every subsequent sitcom about single characters". nybooks.