Finance and Philosophy (Paul Dry Books) explains how bankers and financial regulators fail to measure the shifting risks of the financial system. Alex Pollock *69 argues that the inevitability of this ignorance to risk should compel financial leaders to act moderately. Pollock is a distinguished senior fellow at the R Street Institute, former resident fellow at the American Enterprise Institute, and former President and CEO of the Federal Home Loan Bank of Chicago. This is his second book on financial markets.