A history of civ part 2

Kids,

This may or may not be true, but based on the many clues we have it is
our best guess.

Once upon a time 10,000 years ago, or abot 500 grand ma and grand pas's
ago, the earth's temperature was much like it is today, hot warm dry
summers, and cold winters, which was different from the ice age and the
weather before, and this temperature was good for plants that grew seeds
that enabled them to survive hot dry summers. One kind of plant that
grew well was wheat.

At this time people had to find new ways to feed their families.
Vegetables were plentiful. So people built camps next to where the
plants grew, and became like plants themsevles, and hunted nearby
animals to supplement their diets.

The people learned how to take the seeds and plant them and grow more
food than they ever had before. The first farmers were Sumerians that
lived in several cities the greatest of which was Ur. They learned how
to irrigate and fertilize. One ingenious method were the floating farms
used in the lake that is now Mexico City.

At the same time people learned how to domesticate animals.

Their farms produced so much food that they had lots of children, and
they built walls and armies to protect their farms from other people.

Over time populations grew, but the farms stayed the same size. The land
became less fertile. Salt began to build up in the soil due to irrgation
practices. Farms had to be abadonned and poorer lots of land and
hillsides had to be b