A small group of food producers and their supporters gathered at Tomales Bay Foods on a recent November evening to commemorate the end of Marin Organic, the 14-year old nonprofit that has played a central role in promoting sustainable farming in the county.

Around a potluck buffet and plenty of cheese, people sipped beer and bourbon out of mason jars, mingled and listened to informal speeches. 

“Marin Organic reinforced everything I know about the way…