theft
Explanation
This comic is about the adage that "good artists borrow, great artists steal" -- a quote often attributed to Picasso (though its true origin is debated).
In the first panel, someone asks a writer how they come up with new writing ideas. The writer responds that stealing is just part of the creative process -- most creative people take something, modify it, and present it as original work.
Another character pushes back: if everyone steals, how do writers ever come up with anything? The writer responds that you have to go back to the source -- referring to ancient works, myths, or history.
The final panel shows a caveman or ancient figure, suggesting that if you trace the chain of creative "theft" all the way back, even the earliest storytellers were stealing from each other. The punchline implies that there is no original source -- it's theft all the way down.
The comic satirizes discussions about originality in creative work, suggesting that the anxiety over whether ideas are "stolen" is pointless because all creativity has always been derivative. It's a humorous take on the philosophy of artistic influence.