Louisa and Alex Hargrave were pioneers. Fresh out of Harvard in 1969, in love with each other and their dream of owning a vineyard, they searched the West and East coasts before they bought a run-down 1680-vintage potato farm in 1973, on Long Island's North Fork-and planted ten thousand vinifera vines. At the time, experts said that growing wine grapes on Long Island was impossible. Today, the region is famous for its premium wines. In The Vineyard,...