I used to be a regular at a wine bar in San Clemente, a beach town in California where my wife and I lived when we were first married. The ‘Tuscan’ decor of the place was a little too vivid for my taste, but the wine was priced right and the owner was a great conversationalist. He would tell us stories from behind the bar about his travels to vineyards in Chile and New Zealand, and he had a charming populist streak. When people got too pretentious about the wine, he would roll his eyes and say: ‘Relax, it’s just a beverage.’ He was wrong about that, of course. Since its invention more than 8,000 years ago, wine has always been more than just a beverage.