Using northeast Thailand as a model, this work uses stable isotopes of carbon and nitrogen to infer paleodietary change in subtropical monsoon Asia. It is hypothesized that in northeast Thailand during the pre-state Metal Age (2000 B.C. to A.D. 500) there are distinct differences among the populations during this time period which coincide with human induced environmental changes and developments of alternative subsistence technologies. It is further hypothesized that female and male diets differed, possibly from social circumstances, such as sex related food accessibility. The archaeological...