Instinct vs. invention
It is a fact that in our time, 28 000 years after the disappearance of the Neanderthals, the modern human is the only species on Earth possessing language. Clearly, we are the only species with sufficient anatomical prerequisites for language learning, but linguists disagree about our degree of anatomical specialization for language.
Some linguists claim that the reason why humans are the only possessors of language is that we have an innate language capacity. Others claim that the reason is our general cognitive capacities, which surpass those of all other species.