I would say that the country with the longest average growing season is Saudi Arabia.
I hope this helps you!
My point of view is if you were living waaayyyyy back then
positive:
- fresh water
- food
- fertile soil
- trading
- easier travel
- can connect cities
negative:
- flooding
- vulnerable to invasions
- water could dry up
- seasonal changes
A the southwest isnt an area that is fully populated yet due to the land layout and the weather and lack of jobs