Puzzler

"Puzzle-solving is such an ancient, universal practice, scholars say, precisely because it depends on creative insight, on the primitive spark that ignited the first campfires." - from Benedict Carey's "Tracing the Spark of Creative Problem-Solving"

STTA. The contention here is that there's something especially important in puzzle-solving to the trajectory of human culture. It all starts with a mental state about to play. Based on your experience solving puzzles, what do you think?