These are the most frequently used words in another edition of this book.
africa
african
ago
agriculture
already
american
americas
among
ancestors
animals
areas
asia
asian
australia
australians
austronesian
between
big
century
chapter
chiefdoms
china
chinese
continent
crescent
crops
dates
developed
development
different
diseases
domestic
domesticated
domestication
early
east
eastern
eurasia
europe
european
even
evidence
example
far
farmers
fertile
few
first
food
germs
groups
guinea
guns
history
human
indians
instead
islands
languages
large
less
local
mammals
may
miles
modern
native
new
north
now
parts
people
plants
population
production
reason
seeds
sites
small
societies
south
species
spread
states
still
systems
technology
themselves
thousands
thus
time
today
tools
tropical
two
use
wild
world
writing
years