Surviving 10, 20 or more years after SHTF

[Phil]

The suggestion that in the event of such a collapse we would all go back to the 15th century or earlier seems to me to over look all the trials the human race has weathered in the past.
Even if the event was worldwide it would fail to wipe out completely all knowledge.
Certainly in the first world there are numerous museums stacked with products from previous ages,most of which still function,and could be copied.
Libraries are chockfull of history and how to do things type books,so if you can read you can learn,provided you will apply yourself.
If you are unable physically to do the work required you should be able to assist by encouragement someone else or a group to do so.