History by Numbers No intelligent person would write a book about the 20th century being 1901-2000 simply because anyone intelligent enough realizes that those cutoff dates are correct but artificial. The century from 1851-1950 saw history progress from the industrial revolution to the atomic bomb. It saw the most dreadful wars of all time from the US Civil War to WW II. There's nothing magical about 1901-2000 or 1801-1900. So one can spot the junk quite simply. Any media that covers a time frame that is artificial such as 1900-1999 is a sign that it was created by a moron. It also shows why no one has bothered to do it right. Because anyone intelligent enough to do it right also knows that it is nonsense in the first place to do it at all. More generally one can also infer that anyone who refers to Centuries or Millennia as if they actually meant something is a moron.