A BBC RADIO 4 BOOK OF THE WEEK Powerfully argued Fascinating and pacy Sunday Times Book of the Week Superbly written sure to please readers of Yuval Noah Harari or Rutger Bregman The Times Full of amazing facts ObserverIn this revelatory book Dr Jonathan Kennedy argues that germs have shaped humanity at every stage from the first success of Homo sapiens over the equally intelligent Neanderthals to the fall of Rome and the rise of Islam How did an Indonesian volcano help cause the Black Death setting Europe on the road to capitalism How could 168 men extract the largest ransom in history from an opposing army of eighty thousand And why did the Industrial Revolution lead to the birth of the modern welfare state The latest science reveals that infectious diseases are not just something that happens to us but a fundamental part of who we are Indeed the only reason humans don t lay eggs is that a virus long ago inserted itself into our DNA and there are as many bacteria in your body as there are human cells We have been thinking about the survival of the fittest all wrong evolution is not simply about human strength and intelligence but about how we live and thrive in a world dominated by microbes By exploring the startling intimacy of our relationsh