To the casual observer, the American right can appear an undifferentiated wall of denial and obstructionism on climate change, but behind the scenes there are signs of movement. A growing number of conservative leaders and intellectuals have come to terms with climate science and begun casting about for solutions. Led mainly by libertarians and libertarian-leaning economists, they've begun to coalesce behind a carbon tax, which they consider the most market-friendly of the available alternatives. Jerry Taylor, a longtime veteran of the libertarian think tank Cato Institute who recently founded his own libertarian organization, the Niskanen Center, is a vocal proponent...