[mrozbarry]

I think any attempt at "de-extinction" is quite literally a statement of disbelief of evolution. A core tenant (at least from my perspective) of evolution is survival of the fittest. I agree with all the other comments mentioning that the voids that extinct animals left have been filled and their ecosystems have changed, but that is different from their ecosystems being destroyed. Accept change, and move on. Also, humanity has a track record of trying to play god and that not going too well.

[pessimizer]

Evolution isn't a doctrine that you're supposed to follow, that's social Darwinism.

[drc500free]

Any attempt at "building anything at all" is quite literally a statement of disbelief in entropy.