Insights The First Agricultural Revolution -Geographers believe that plant domestication began in Asia & South America over 14,000 years ago -This led to the planned cultivation of root crops -Geographers believe that seed crop cultivation began around 12,000 years ago in the Nile River Valley and Mesopotamia regions -This was much more complex than root crops (had to have more elaborate watering, sowing & harvesting) -This marked the beginning of the ?First Agricultural Revolution? -Impact of First Agricultural Revolution led to amore reliable food source & permanent settlements -This led to the first time period of population growth -All of these agricultural hearths eventually experienced diffusion to other areas