First Paragraph

 The European continent was at peace on the morning of Sunday 28 June 1914, when Archduke Franz Ferdinand and his wife Sophie Chotek arrived at Sarajevo railway station. Thirty-seven days later, it was at war. The conflict that began that summer mobilized 65 million troops, claimed three empires, 20 million military and civilian deaths, and 21 million wounded. The horrors of Europe's twentieth century were born of this catastrophe; it was, as the American businessman Fritz Stern put it, 'the first calamity of the twentieth century, the calamity from which all other calamities sprang'. The debate over why it happened began before the first shots were fired and has been running ever since. It has spawned an historical literature of unparalleled size, sophistication and moral intensity. For international relations theorists the events of 1914 remain the political crisis par excellence, intricate enough to accommodate any number of hypotheses.

- From The Sleepwalkers: How Europe Went to War in 1914 by Christopher Clark