Evolution must be a force because it has been proven that outside influences(such as cold etc) do not change a species but merely emphasize the variation within a species.
Apparently you are unaware of
oberved instances of speciation.
For instance if I cut off my index finger and all my progeny cut theirs off, my g, g, g, g, g, great grandchildren would still be born with index fingers. This has been known for many
And the theory of evolution does not say that anything else should happen. This is a total non-sequitur.
but some evos still try to survival of the fittest drives evolution, it doesn't and has been proven.
"Survival of the fittest" doesn't drive evolution. Mutation combined with environmental reproductive selection pressures drive evolution. This has been observed. Your "index finger" argument doesn't disprove this in the least.