Is a sense of humor a byproduct, an accident, or was it installed on purpose? For better health? There definitely seems to be a purpose.
William Lane Craig’s rhetorical strategy is essentially to accept whatever mainstream evolutionary paleoanthropology says.
Those paragraphs are, not surprisingly, a de rigueur nod to evolutionary theory, and as usual, it’s pure gloss, no substance.
“The case that human language develops step by step through natural selection is weakened by the fact that no single language gene has ever been discovered.”