survival of the fittest
the idea that the most able or fit will survive

[TahlilGaran] Dictionary of Contemporary English ▲

survival of the fittest
the idea that the most able or fit will survive
It was a matter of the survival of the fittest in the jungle.

[TahlilGaran] English Idioms Dictionary ▲

survival of the fittest
n. phr. The staying alive or in action of the best prepared; often: idea that those living things best able to adjust to life survive and those unable to adjust die out.
Life in the old West was often a case of survival of the fittest.
With changes in the world's climate, dinosaurs died but many smaller animals lived on. It was survival of the fittest.
On the 50-mile hike it was survival of the fittest; only 12 out of 25 Scouts finished.

[TahlilGaran] English Idioms Dictionary ▲