(Bloomberg) - Wine is one of those rare industries in which one person’s opinion can make fortunes or break them. Credit Robert Parker. For three decades he dominated as the world’s most influential wine critic. He popularized the 100-point rating scale, and the scores in his monthly newsletter, the Wine Advocate, drove demand and prices. Prior to selling the company in 2012, Parker had planned to hand the business to his protégé, Antonio Galloni, but they couldn't reach a deal. Galloni has since built his own brand, Vinous, bought the crowdsourced ratings app Delectable, and lured away the Wine Advocate’s top critic, Neal Martin.