Spatial Levels in Cultural Organization: An Empirical Study1

Interpreting comparative observations from diverse world cultures poses the dilemma of how to unfold the wide variety of functional and historical processes observed in cultural systems. Do correlations among cultural variables represent functional relations or historical adhesions? Some elements are acquired through independent invention (including functional adaptation), others through common origin (through migration, replication of like units) or diffusion (borrowing between units). Diverse origins may indicate differing functions or explanations for cultural phenomena, but functions also change in time and may require different explanations under the selective pressures of a different historical period. Similar institutions among cultures at one point in time may reflect convergent adaptation and historical interaction rather than commonality of origin.