Walter Schiedel and Steven Friesen, two historians of the Roman Empire, have recently attempted to estimate wealth inequality in the Roman Empire when it was at its zenith using papyri ledgers, previous scholarly estimates, imperial edicts, and Biblical passages. Schiedel and Friesen estimate that in 150 AD, the top 1% of Roman society controlled 16% of the wealth, less than half of what America’s top 1% control today! It is also much lower than wealth concentration in N. Ireland - according to the estimate in my recent OEP article, the top 1% of population back in 2001 controlled 22% of the wealth. I have no doubt that that figure is much higher for 2011. You can read more about Schiedel and Friesen's work here.
According to Robert Shiller , speaking at Davos, Bitcoin is a perfect example of a bubble - story here . Shiller sees Bitcoin as a backwards step in the evolution of money. George Selgin , a free banker, takes an opposing view - click here . Although he doesn't believe that Bitcoin is money, he sees its development as a fascinating turn in the evolution of money. In particular, he lauds the fact that Bitcoin production is constrained and cannot be infinite. There is a short video below where Bitcoin explain how it works.