Below Harvard's Steven Pinker gives an interesting interview on the paradox of why pessimism is so high in a world of increasing abundance. He also talks about the close correlation between peace and capitalism (or democracy and international organisations) as well as the importance of flushed toilets!
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.