Linguistic prehistory is a remarkable subject. It integrates with many other disciplines: archaeology, historical and comparative linguistics, lexicostatistical dating, glottochronology, prehistoric population movements and replacement, mitochrondrial dna genetic popolulation studies and much more...
What do you make of such studies? Are they valuable, helpful? Of great import or of little importance? What are the implications of such studies for culture history, culture process, behavioral human ecology, etc.