"it will be backed by a collection of low-volatility assets, such as bank deposits and short-term government securities in currencies from stable and reputable central banks." from the whitepaper: https://libra.org/en-US/white-paper/#the-libra-currency-and-...
It's like one to one copy of the traditional monetary system with speed of transactions improved. The volatility of low-volatile assets still contradictive in the long term (I mean just ~5 years) So I don't see any innovative approach in the terms of social order and decentralization.