Quote by Charles Stross
Humans are just barely intelligent tool users; Darwinian evolutionary selection stopped when language and tool use converged, leaving the average hairy meme carrier sadly deficient in smarts.
Summary
This quote suggests that humans, as intelligent beings, have reached a point in their evolution where language and tool use have become crucial aspects of their existence. However, the quote implies that evolution stopped selecting for increased intelligence once these abilities were acquired. Consequently, the average human is considered to be lacking in intelligence compared to the potential that could have been attained through continued evolutionary processes. Despite being tool users, humans are portrayed as somewhat limited in their intellectual capabilities.