it might sound kind of stupid, but think of it, how many things are guided by the weather..
Take for an example here in Denmark.. and I know thins counts for most places in norther Europe.. we care for our nest.. our house or apartment. Because the weather generally is pretty fucking shitty, we need to find a place where we can seek refuge, right.. so we basically spend a lot of time indoor. Most of the year it is to crappy for social activity outside, so again.. we stay indoor.
Then take Spain, Greece, Italy or some of the other countries in southern Europe. A majority of the year, weather is quite good. It gets to warm to sit inside.. so people gets outside, and as a result of that, they easily get very social. Also.. good weather makes people more happy, so they are generally more relaxed and happy cultures than us in the north..
But.. to much socialisation gets disturbing towards the job, unless it is a job you really like.. so they are generally very bad at working, because they have a culture for relaxation..
Go to Andalusia if you doubt my theories.. the most warmest parts of Spain, and people are really freaking relaxed. This counts mostly for european culture.. my experience is that arab cultures are different on these terms.. go to Morocco, and the activity level is way higher.. than the regions near to them in Spain..
As I see it, everything comes with advantages as well as disadvantages..
we have our stuff in the north, and they have theirs in the south..
would be boring to go visit another part of the world, if people where 100% similar..