QED wrote:You seem to me to be rigging your conclusion by ignoring all the incredibly stupid stuff that's unique to humans.
Well, that's what happens when you start making vague value judgements about what "best" is. I stand by my original statement: from the evolutionary perspective, we are currently "best" on this planet (I can't speculate about aliens until I've seen one).
Yes, dolphins can swim better than us, and tigers have bigger claws, and birds can fly; but, as a species, we can outperform them as far as passing down our genes is concerned. We have our technology to thank for that. Giant squids can eat an individual human, but, as a species, we consider them sushi.
In fact, ultimately, we can also build submarines, swords, airplanes, and even things with no natural analogue, such as the Internet. Dolphins can't fly, and there's no reason to suppose that they ever would.
Note that I'm not making some sort of a moral or cultural judgement here; I'm merely trying to define "best" in some sort of objective terms. Otherwise, you get dragged down into debates about whose "best" is the best "best", and eventually the whole conversation devolves into pin-head-angel-counting.