We are becoming a nation of "inside people" in many ways. It used to be that a lot of people lived in the country, or at least in a house where they had a large yard, room for a garden, and a swing set for the kids to play on. There would be some kind of a wooded lot off down the road where we could build a fort, or just hide out, or play cowboys and indians.
Now, when you look at a neighborhood; often the house is huge, and takes up most of the lot. No garden, and sometimes there are flowers, but usually just landscaping shrubbery.
People come home, go inside, and except for a BBQ on the back deck; they live in front of the television or the computer. Many of the kids seem to exist in some virtual online world of gaming or wars. When these people do go outside, they are slathered in sunscreen; and drive their air-conditioned car.
If our economy ever does collapse, or an EMP hits us; these people are going to be in a world of hurt, because they have very little connection with the real world.