One might as well say we are hardwired to social stratification (which we almost certainly are) and our language reflects that.
Every human society has more-or-less arbitrary rules or fashions, and how closely our behaviour conforms to those rules reflects our social status. This is universal and almost certainly evolved over the course of our million-year-long dance of mate competition and selection.
Since social rules are fairly arbitrary (which we know because they vary so much) there are bound to be situations where it is useful to be able to signal we are moving outside them. Taboo words serve that function very efficiently.
This is a bit different from saying "We are hardwired to have taboo words", but it does show there are perfectly sensible ways to think about hardwiring in this regard, and it's a bit tricky to get away from.
One way of testing this hypothesis would be to look at the distribution of taboo words as a function of the strength and complexity of social hierarchies. I would predict that strongly hierarchical societies with more social restrictions would tend to have more taboo words and likely a finer grading of taboo words than more relaxed societies. On the other hand, if we are more directly hardwired to have taboo words, there would be no reason for the number or gradation to vary across different societies.
Every human society has more-or-less arbitrary rules or fashions, and how closely our behaviour conforms to those rules reflects our social status. This is universal and almost certainly evolved over the course of our million-year-long dance of mate competition and selection.
Since social rules are fairly arbitrary (which we know because they vary so much) there are bound to be situations where it is useful to be able to signal we are moving outside them. Taboo words serve that function very efficiently.
This is a bit different from saying "We are hardwired to have taboo words", but it does show there are perfectly sensible ways to think about hardwiring in this regard, and it's a bit tricky to get away from.
One way of testing this hypothesis would be to look at the distribution of taboo words as a function of the strength and complexity of social hierarchies. I would predict that strongly hierarchical societies with more social restrictions would tend to have more taboo words and likely a finer grading of taboo words than more relaxed societies. On the other hand, if we are more directly hardwired to have taboo words, there would be no reason for the number or gradation to vary across different societies.