 Debate and criticism of cultural destruction and loss began in the 1960s.However, the period between 1975 and 1979 saw the most zealous anti-religion campaign and destruction of temples.On the eve of the Đổi Mới reforms, from 1985 onwards, the state gradually returned to a policy of protection of the religious culture, and the Vietnamese indigenous religion was soon promoted as the backbone of "a progressive culture, imbued with national identity".