No single human can build the pyramids but a single human can design them. Humaniy is superhumanly capable but not superhumanly intelligent.
I disagree. You can design a pyramid only by using a lot of knowledge that other people made for you.
I think a good example of a "single human" is a feral child.
Serious question. No single human being can build a nuclear reactor, land on the moon or calculate pi to the billionth digit, but humanity can. Does it qualify?