In the modern period what has affected the indigenous languages most has been the pressure of social marginalization put on the indigenous populations by a growing mestizo class and a growing institutionalization of Hispanic society. Indigenous languages have been seen by the governing classes as a hindrance to building homogeneous nation states and as an impediment to social progress. These viewpoints sparked a renewed interest in the hispanization of indigenous communities and while the introduction of compulsory education in Spanish has undoubtedly resulted in a more homogeneous society it has also done much for the decline of indigenous languages throughout the 20th century. In a number of indigenous communities it has become practice to learn Spanish first and the indigenous language second. Parents have refrained from teaching their children their own language in order not to subject them to the social stigma of speaking an Indian language – and youths have learned their languages only when they came of age and started taking part in the adult society.