Most historians would have us believe that the twenty-first century began in 1989, with the fall of the Berlin Wall. But the world we live in today and the problems that plague it can actually be traced back a decade earlier. 1979 was the year that the postwar order evaporated, reshaping the international system and making way for a new era of global history. Christian Caryl discusses each of the year's five major counterrevolutions in turn, weaving together the dramatic stories into a paradigm-shifting revision of our recent history. The result is a startling new argument about the hinge on which the twentieth century turned.