You’re a caveman (I don’t need to say caveperson since political correctness has only been around for 0.000000000000001% of human existence). Your ability to effectively categorize sh*t is everything. Is that shadow moving in the woods tasty prey or a nasty predator? Is that berry fire engine red (granted you don’t know what a fire engine is since the whole flame thing is pretty new) because it’s delicious or deadly? Despite the body hair, protruding forehead and inability to really get your jokes, will that female humanoid bear you healthy Australopithi-babies or leave you for that asshole Uggghh and take you for your cave and wheel? Fast forward to now. The world is essentially stable (unless you’re living in the majority of it that isn’t). You don’t really need to filter your world into boxes, but you do cause it’s hard wired. Knowing this can help you to write screenplays, but if you’re like me, it probably won’t get your ass laid.