Curt Ellis, co-creator of the film King Corn and founder of Food Corps, reflects on his film and the power of like-minded documentaries in How Docs Like ‘Weight of the Nation’ Are Making America Healthier. “Films have a unique ability to provoke empathy and motivate audiences to take action. Viewers respond extra viscerally to stories about food — something the print journalist Upton Sinclair noted when his slaughterhouse exposé “The Jungle” came out in 1906: ‘I aimed at the public’s heart and by accident I hit it in the stomach.’