This paper states that international migration today is a global reality for nation-states as the number of migrants are rapidly increasing each year. Further, the paper talks about paradox of transnational migration where socio-economic and political cause of migration for one set of tribes in one region becomes a socio-economic and political consequence for another set of tribes in another region, changing the environment of that region. The paper has discussed contemporary debates on emigrants and immigrants through examples. An appraisal of theories of international migration has been spelled out which says that international migration theories earlier were focussing on labour economics like neo-classical (macro and micro theory), new economic theory of migration, dual labour market theory, dependency theory and world market theory. Considering the fact, that there are other reasons also for migration; emerged network, world systems and mixed migration theory. An attempt has been made in this paper for deriving of a new comprehensive theory of international migration termed as
International Migration, Labour Economics, Networks, Emigrants and Immigrants, Need Fulfilment