Has the causal and temporal relationship between cooking and modern brain development been firmly established? The last time I looked into the literature I coul

Has the causal and temporal relationship between cooking and modern brain development been firmly established? The last time I looked into the literature I could find (a decade ago), there seemed to be a tantalizing correlation but enough noise in the timing of cooking to place it well short of being an well-accepted theory. And the question of what constitutes a "modern brain" and when our ancestors had it was an even fuzzier area.