The eternal question is to define 'survival'. TEOTWAWKI? Book Of Eli Postnuclear Armageddon? Making a log raft from scratch to escape Gilligan's Island? Or two weeks recreational wilderness bushwhacking, making fires & skinning small game? I like my Mora Companion, haven't used it a lot so far, but it wouldn't be my choice for a main you-can-only-have-one-blade in any of the above. For rock solid durability probably a Becker BK 2/7/9, for general utility a KaBar 7" USMC, a Mora if the priorities are for what a Mora excels at.