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The Ramayana is much shorter than the Mahabharata despite later additions. The scene is set in the middle Ganges Plain and the Vindhyan forests. The original version is attributed to the poet Valmiki, who probably brought together oral fragments and crafted them into poetry that was to become a hallmark of early Sanskrit literature. It is frequently described as the first literary composition, the adi-kavya, a description not used for the other epic, Mahabharata. The original version of the Ramayana is generally dated to the mid-first millennium B.C. The conflict between Rama and Ravana probably reflects a detailed version of local conflicts, occurring between the expanding kingdoms of the Gangetic Plain and the tribes of the Vindhyan region. The kingdom of Kosala represents the newly emerging monarchies and is a contrast to the society of the rakshasas, or the forest tribes who were demonized because their pattern of life was so different from that of the monarchies. The transference of events to a more southerly location may have been the work of a later period, reflecting an expanded geography, as was possibly also the case in the depiction of Lanka itself as a city of immense wealth.