Archaeologists working in non-Western areas of the world tend to employ mon
othetic, unilinear definitions of 'urbanization'. The definition of what co
nstitutes a 'city' in archaeological terms is also ambiguous. Most definiti
ons are biased by dependence on early archaeological work in the Mediterran
ean and Southwest Asia. Models of city formation must be based on multi-lin
ear, polythetic criteria, in order to accommodate non-Western phenomena. A
polythetic functional definition of urbanization recognizes two distinct fo
rms of the city: orthogenetic and heterogenetic. Literature on Southeast As
ia has mainly concerned itself with orthogenetic sties. This article presen
ts archaeological data on under-studied heterogenetic cities in insular Sou
theast Asia.