The Whisper Network. Before the internet there was the laundry line

"The Whisper Network - Before the internet there was the laundry line" explores the history of "Word of Mouth" marketing before social media. It focuses on the 1920s and 30s, when companies like Procter & Gamble realized that women didn't trust ads, but they trusted their neighbors. Author Sarah Voice details the invention of the "Soap Opera"-radio dramas created solely to sell detergent to housewives-and the orchestrated "whisper campaigns" where paid actors would ride elevators or sit in parks, loudly praising a product to "overhearing" strangers. "The Whisper Network" is a masterclass in analog virality.
It shows that the mechanics of influencers and viral trends existed long before Instagram, rooted in the timeless human habit of gossip and the credibility of a recommendation from a "friend."