World War Before

Most of us are taught that the worst "World Wars" happened in the 20th century. World War I followed by World War 2 killed 70 million people and destroyed millions of square miles of land, property, and cities. 3 percent of the human populations died. My last book "World War Zero" described the World War before that [about 55 hundred years ago]. Worse than the more well known ones, 1/3 of the population of the entire world died and the world was sent back to a Stone Age existence, but that ...