[orionblamblam]

> There has not yet be any evidence of evolution *around* those limits.

Sure there are. Can't outrun the predators? Figure out how to make a pointed stick.

[TalonDJ]

Sharpening a pointed stick is not evolution. Neither is building a wall around your city or inventing a Gatling gun. Those may be increasing chances of survival but they have nothing to do with evolution except in the sense that they might be demonstrations of using the a brain power. But the spear did not evolve the brain power. The time lag between the spear and the brain power from a genetic mutation standpoint makes the evolution of it as a survival trait extremely improbable. There is no evidence that it did evolve unless you take on faith that nothing but random chance could have done it. With full faith in that you can believe the theory without any further evidence.