Nicolas Joly returned, leaving behind a career in finance, to the fabled Coulée de Serrant in 1977. The celebrated vineyard, which comprises its own appellation, was planted in the 1130s. At first he implemented modern agricultural methods, but afters three years he became troubled by subtle but noticeable alterations in the vineyards. After reading a book on biodynamics that he picked up by chance, he became fascinated by the concept, and embarked on a experimental reconversion of a small area of vineyards. Rapidly convinced by the results, he started to implement biodynamic practices across the estate and has been Demeter and Ecocert certified since 1984. In 2001, he founded "La Renaissance des Appellations/Return to Terroir" and today the organization boasts 140 producers from around world. He has written many books on the subject, and is widely considered a pioneer and leader of the biodynamic wine movement.