Very roughly: leftwingers tend to be Keynesians, libertarians believe in laissez-faire, conservatives like ordo-liberalism. The technical-economic debate suffers though when participants fear that conceding a technical argument would force them to give up their general world views too.
Out of dozens of potential early warning indicators, foreign exchange reserves are the indicator that had been most often identified as significant by eighty pre-2008 studies conducted on earlier data.
A few years ago, some regarded Japan as having overtaken the US, and Europe, too, was supposedly vying for global economic dominance. Now it's China's turn – and it suffers from the same vulnerabilities that have stymied Europe and Japan.
Three years have now passed since the collapse of Lehman Brothers, which triggered the start of the most acute phase of the 2007-2008 financial crisis. But the financial world is no safer today, because the data needed to identify what caused the crisis have been withheld.