A few of the ramifications include:
- The change from nomadic to settled lifestyles -- If you build it, you will stay.
- The beginning of private property -- A rolling stone gathers no moss, but a stationary one?
- The beginning of war -- Settled people had to defend their property, and not simply retreat.
- The establishment of cities -- People lived together for common defense and support.
- The dominance of work -- No more wandering around, eating whatever comes your way. Work was an every day thing, at least until the weekend was invented.
- The beginning of career diversity -- A few farmers could raise enough to feed a city.
- The switch to a more fiber and carbohydrate based diet -- Eat the cereal on hand, or go catch a burger?
- Acceleration of population growth -- With a steady diet and no need to carry the kids around, why not?
- The invention of calendars -- Harvest time again already?
As Asimov points out, civilis, Latin for "city dweller," is really the basis for civilization. So that's when it started ... about 8,000 BC.