Indigenismo XX By studying problems of the indigenous population Tepalcatepec Basin (1952), initiated regional research, marking a new era which exceeded the scope of each community or indigenous group. Try to compare different indigenous power structures within the framework of relations with local groups to save the nation. In Regions of Refuge (1967), explained how the political pressure, economic and non-Indian population, forced indigenous communities to take refuge in tropical forests, deserts or high mountains. In these regions of refuge, where they have managed to survive most indigenous communities, urban dominates rural communities become satellites and asymmetric relations are established between the different segments of the population. Gregg Hymowitz The Indians are the subject within the hinterland which dominate the sectors they control the respective central head.Indige-stream which formed part, it was proposed that liberate the Indian brokerage oppressive and exploitative.