Volume three of three collecting ALL of the Psychotechnic League future history stories, from multiple Hugo- and Nebula-award-winning author Poul Anderson. Includes stories never before collected in a Psychotechnic League volume! After World War III ravages the globe, humanity, led by the Psychotechnic Institute, bands together to create peace on Earth and to spread that peace throughout the Solar System and beyond. But soon the cycle of war and destruction begins anew.  After World War III has ravaged the globe and toppled once-great nations, a new science offers hope for the future: Psychodynamics, the ability to influence government and popular opinion. Led by the Psychotechnic Institute, humanity denounces its violent ways, once and for all. Peace reigns on Earth. Humankind shakes off the tyranny of gravity and ventures out into the galaxy. But no sooner is utopia realized than the cycle of war and destruction begins anew. The final of three volumes collecting all of multiple Hugo- and Nebula-Award winning author Poul Anderson's massive future history magnum opus. Includes short stories previously uncollected in a Psychotechnic League volume! About Poul Anderson: "One of science fiction's authentic geniuses."-Chicago Sun-Times "Anderson fuses elegiac prose and a sweeping vision of man's technological future..."-Booklist "One of science fiction's giants."-Arthur C. Clarke