The Third Milleniun shows a world with a great population mobility where to some extendpeople try to hedge the great income disparities among regions. Migrations are a human pro- cess of socio-relational and multi-dimensional character, highly selective and differential that obligates at distinct levels of interaction degrees not only migrant individuals but also receptive societies that support the adaptation processes, which later may give birth to cultural hybrids very significant to the places. In this paper I analyze the condition factors of migration and their effects on the definition of migratory potential and decision to emigrate.