Conservatives, crack open some champagne and celebrate. A remarkable renewal of traditional painting and sculpture has taken place in the American art scene over the past 10 years. At last, a cultural movement has emerged that builds upon time-honored practices instead of deconstructing them. In cities all over the country, new atelier schools are teaching classic methods of sculpting, drawing and painting, giving students solid foundations in techniques dating to classical Greece. The art they produce is exquisitely made, and also unmistakably of this time. This flourishing community of 21st-century representational painters and sculptors is deeply concerned with making—in the simplest possible formulation—“stuff that looks like stuff”: imaginative but realist paintings that point their audience toward traditional subjects and ideas, but with refreshingly novel conceptions. These artists are using the Western idioms of art-making praised by America’s founding fathers themselves—George Washington, John Adams, James Wilson and Thomas Paine. Washington collected paintings of the sublime American landscape before such paintings were considered credible art. Adams was enthusiastic about historical paintings. He also found delight in art …