This is a difficult question and the answer required is very lengthy, it could be a book. I have been working on documentation regarding survival for more than a year, covering many situations and the list is incomplete and runs for hundreds of pages.
YOU NEED TO CREATE AN INDEX TO A BOOK THE SCOUR THE INTERNET FOR ANSWERS
Now that I have a working document and am sure of what the problems are I am starting to buy things that fulfill missions within "survival." But my lists are incomplete b/c research in to any of these areas takes a lot of reading and video watching and years of knowledge.
Your best bet is to
- join many knife related forums and learn abt steels and manufacturers.
- join many survival forums and start to develop your own lists.
- follow as many knife, primitive living and survival accounts on YouTube as you can find.
Surviving what exactly?
- survival by sheltering in place vs on the move?
- the cold or heat?
- lack of water or food?
- an earthquake, civil war, tsunami, radiation, nuclear war, conventional war, political unrest, riots?
Start to buy books on
- edible plants within 1,000 miles of your home.
- bushcrafting.
- hunting, fishing, trapping with little/few weapons.
Take lessons on
- shooting, hunting, using weapons / small arms
- survival.
- camping, trapping, hunting, self defense...
Weapons?
- what weapons
- home made weapons
.
.
.
and it goes on and on.