Dani Rodrik is skeptical of claims that there has been a big increase in protectionism recently:
The reality is that the international trade regime has passed its greatest test since the Great Depression with flying colours. Trade economists who complain about minor instances of protectionism sound like a child whining about a damaged toy in the wake of an earthquake that killed thousands.
His explanation for the trade regime's success:
The welfare state is the flip side of the open economy. If the world has not fallen off the protectionist precipice during the crisis, as it did during the 1930’s, much of the credit must go the social programmes that conservatives and market fundamentalists would like to see scrapped.
But we are not out of the woods yet:
The battle against trade protection has been won — so far. But, before we relax, let’s remember that we still have not addressed the central challenge the world economy will face as the crisis eases: the inevitable clash between China’s need to produce an ever-growing quantity of manufactured goods and America’s need to maintain a smaller current-account deficit. Unfortunately, there is little to suggest that policymakers are yet ready to confront this genuine threat.