Just as war is too important to leave in the hands of generals, global climate is too important to leave solely in the hands of politicians who are being pulled in a million directions. This pithy yet compelling book makes abundantly clear what we know and don’t know about global warming; why those uncertainties merit prudent but urgent action; how those actions, both at home and abroad, may amount to the most difficult political transaction in the history of mankind; and why politics as usual simply will not get the job done.