I'll second what Dand said. It is an attitude. It's seeing something that needs doing and doing it. It's stopping to help someone get out of the ditch. It's throwing a couple of gallons of gas in someone's rig when they run out and not taking any reimbursement for it.
And as Dand said you will find it all over the world. When we came to America when I was a wee lad, we arrived in the middle of the night after flying for 2 days in a Boeing Stratocruiser from Indonesia. One of my Dad's colleagues was waiting at the airport to take us to our housing. The apartment had some temporary furnishings, made up beds and dinner in the oven. When my Mom found out the next day who had got it ready and thanked them, the lady said "don't thank us, just pass it on."
I've been trying to do that ever since, and I think that attitude is very prevalent up here. That makes a person an Alaskan. "Don't thank me, just pass it on."
-Kees-