For decades the renowned grape of Bordeaux, Cabernet Sauvignon, produced the most popular red wine in the world ... or at least in this country. When Napa Valley — and subsequently California — burst forth in the mid-1970s as world-class wine country, Cabernet led the pack. The wines made from this grape were mouth-filling, bold, rich, tannic and needed a few years in the bottle before becoming tame enough for most wine drinkers of the time.