For instance, when financial traders buy and sell securities or commodities, they’re making bets on the direction of markets or trying to protect assets from market fluctuations. That’s actually something that all of us have to do, even outside of the financial world, because of the way that the financial economy has grown since the 1970s, particularly in the United States and Europe. Over the last 40 years, financial markets have become a force not only driving the economy but also our cultural, social and political lives.