Roughly 8.6 per cent of India's population is made up of "Scheduled Tribes" (STs), traditional tribal communities. In India those who are not Christians, Muslims, Jews, or Zoroastrians are identified as Hindus. The reason being varied beliefs and practices allowed in Hindusim and according of Hindusim as a geographical identity than merely Religious ones. Though, many of the Scheduled Tribes have modes of worship not typical to mainstream Hindusim but ontologically form part of the cultural practices of the land, as Nature or ancestral worship, with varying degrees of syncretism.[citation needed]