You're off by a few there lol :D Earth is actually 4.54 billion years old.
The Selective Service Act of 1917 or Selective Draft Act authorized the United States federal government to raise a national army for service in World War I through conscription
Answer:
Settler societies settled, duh, and they grew crops and saved their provisions for later dates, where as hunter-gatherer societies didn't scavenge for leftover meat, they actively killed animals and ate everything, not saving it for another day.
