Thirty-seven years ago, the United States was poised on the edge of an energy revolution. The interdepartmental plan that Dr. Allan Hoffman presented President Jimmy Carter outlined how the nation could derive 20% of its’ power from renewables (principally wind & solar) by the year 2000.  What could have happened, if Carter’s successors had pressed forward, is another of the great “ifs” of history. Hoffman answers another question in his book THE U.S. GOVERNMENT & RENEWABLE ENERGY: how America adopts energy policies.