Exactly.A long term outage covering a large part of a developed nation would probably kill millions.
No internet=no food, apart from what you have already stocked, can grow, or hunt, or barter for within walking distance.
No internet=no oil, after emergency stockpiles have been used.
No internet=no money, apart from cash transactions within walking distance.
No internet=no grid electricity.
No internet=no natural gas supply, no urban water supply.
No internet=no modern medical treatment.
My wife and I have decided to regard the Web etc as a 'gift' or 'loan' ... which will go away within the next decade or so.
It could be wise to stick an old laptop in a metal box (for protection against EMP) and also fill a box with memory sticks and CDs containing old Encarta dictionaries etc.
A stack of medical and surgical videos etc would also be useful.
Also it is possible to obtain full copies of all of Wikipedia - could be worth ordering/making one of these as a reference library.