Humans are very good at dealing with stress, especially when you compare to other animals. Looking at you, giraffe.

However, large parts of human society is actually built on the assumption that, by and large, humanity will rise to the challenge. We push everything to its limit, then pick up the pieces and make adjustments when it breaks. Why? Because that's what the previous winners did, and we are all descendants of winners.

Of course, some won bigger than others...