Somewhere between 10 and 12 billion people.
After Hitler died, Stalin was the leader.
ANSWER TO #2: Maize was important for multiple reasons. One reason is food. They could eat the maize and live off of it. Another reason is money. They could grow and sell maize to raise money to support their families. They could also use it to trade for other resources.
Hope this helps :)
Required to be at least 30 years of age and be a U.S. citizen for 9 years to become one