"...refers to some real event amongst the aboriginal tribes; namely, the quarrel between an elder and younger brother for the possession of a Raj; and the subsequent alliance of Rama with the younger brother. It is somewhat remarkable that Rama appears to have formed an alliance with the wrong party, for the right of Vali was evidently superior to that of Sugriva; and is especially worthy of note that Rama compassed the death of Vali by an act contrary to all the laws of fair fighting. Again, Rama seems to have tacitly sanctioned the transfer of Tara from Bali to Sugriva, which was directly opposed to modern rule, although in conformity with the rude customs of a barbarous age; and it is remarkable that to this day the marriage of both widows and divorced women is practiced by the Marwars or the aborigines of southern Caranatic, contrary to the deep-rooted prejudice which exists against such unions amongst the Hindus at large."
January 1, 1970
https://en.wikiquote.org/wiki/Tara_(Ramayana)