> I think that's why so many people have this unreasonable urge to travel. If you didn't have that in the past very little genetic diversity was available for y

> I think that's why so many people have this unreasonable urge to travel. If you didn't have that in the past very little genetic diversity was available for your offspring. I'd say most of the reason is advertising. There's a lot of people making a lot of money due to everybody travelling around and buying stuff.