Mankind has been talking for hundreds of years, and all that time we've been at each other's throats.
It's so easy to say the wrong thing, to just blurt it out and not be able to take it back, then to accompany it with dismissive body language, we're naturally in trouble.
Could grunting be a better way to communicate? It usually gets its point across, and when it doesn't, it's ambiguous enough that no one knows your intentions so they're OK with it.
Grunting has served the animal world well. You hardly ever hear of any conflicts between animals. Of course they hunt prey, some are predators and some are prey. But that doesn't have anything to do with miscommunication problems. They're just hungry.
Both in effectiveness (even with ambiguity you can convey some powerful thoughts) and efficiency (if you can do pitches you've got the language down), grunting is a better language. Let me qualify that with a "perhaps" it is. Or just grunt, "uhhh," and let you figure it out.
Grunting has helped the animal world maintain their balance, their equilibrium. They haven't advanced like we have, but look at the advantages, they have that balance.
They sleep outside in the winter, I know. Which we don't want to do, but that's another topic.
UPDATE: An understanding student says, "It's not so much what he says, but how he says it."
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The idea for this posting was found in an old notebook in my desk.