The seriation method works because object styles change over time; they always have and always will.
A good example of a change in artifact type is the development of hand-held PDAs from those first enormous cell phones. As an example of how change through time works, consider the different music recording methods that were used in the 20th century.
The diffusion of new ideas can come, however, from the peaceful or warlike expansion of a population into new territory.
These remains include the fossils (preserved bones) of humans, food remains, the ruins of buildings, and human artifactsitems such as tools, pottery, and jewelry.
From their studies, archaeologists attempt to reconstruct past ways of life.
This site contains information about the prehistoric archaeology of the Aegean.
Through a series of lessons and illustrations, it traces the cultural evolution of humanity in the Aegean basin from the era of hunting and gathering (Palaeolithic-Mesolithic) through the early village farming stage (Neolithic) and the formative period of Aegean civilization into the age of the great palatial cultures of Minoan Crete and Mycenaean Greece.