Human prehistory is complex.
To unravel it archaeologists must employ many techniques and theories. People act in a certain way, at a certain time, based on the information they have and their perception of the world around them. Archaeologists can understand the actions of ancient people by the debris they leave behind, if we can separate it from those who came before and after. Scientific dating of the debris helps archaeologists separate debris from many eras, provided we find as many pieces as possible. Archaeologists can't reconstruct a moment in time.