Sheldon Pollock writes that the Bhakti movement was neither a rebellion against Brahmins and the upper castes nor a rebellion against the Sanskrit language, because many of the prominent thinkers and earliest champions of the Bhakti movement were Brahmins and from upper castes, and because much of the early and later Bhakti poetry and literature was in Sanskrit. Further, states Pollock, evidence of Bhakti trends in ancient southeast Asian Hinduism in the 1st millennium CE, such as those in Cambodia and Indonesia where Vedic era is unknown, and where upper caste Tamil Hindu nobility and merchants introduced Bhakti ideas of Hinduism, suggest the roots and the nature of Bhakti movement to be primarily spiritual and political quest instead of rebellion of some form.