what is the most importaint surviva; tool?

[Jakeshunts]

A sheath knife and a flint and steel

[John Doe]

A sturdy knife

[Dodo42]

An axe is better than a knife. Even if it's broken it still has many uses. If you break a knife blade, its almost useless.

[J4huntfish]

what big o said and a estwing fixed hatchet

[kylepountney]

flint knife water

[Kevin Paproski]

Your brain and the will to survive.

[IanS]

your brain

[backcountrybeagle]

If you're in shark filled waters swimming toward land a knife is not going to help much you need your brain above all else.

[JARED WELLS]

a knife

[debins33]

A leatherman is the most important tool it has several things in one a knife a saw a screwdriver and more!!!

[james woods]

in the north woods, some people say a hatchet
in the jungle ,most people say a machete
on frozen tundra both are useless a good knife will serve you well wherever you go, except the airport.

[idahooutdoors]

Already been said, but most important tool is setting ontop of you shoulders, keep a level head and you can usually keep your life.........

[PotterMan96]

Your Mind and a sharp knife

[buckeye]

Intangible: Knowledge, or has some have mentioned you mind.

Tangible: A good Drop point knife with a 4" blade made of a good carbon steel.

[steve182]

Your head.