As a side point, some people here seem to think this post specifically came from 24 contributors. The text at the bottom seems to indicate this and I initially got the same feeling.

However, that's actually a description of the site itself, not the post. There are 24 essays, one per contributor.

Thanks for pointing that out. The text at the bottom is rather misleading.

That's what I thought, too - turns out this link is to just one of the essays.