For the first time in nearly a decade, the Federal Reserve is considering raising its target interest rate, which would end a long period of near-zero rates. Like the cessation of large-scale asset purchases in October 2014, that action will be an important milestone in the unwinding of extraordinary monetary policies, adopted during my tenure as Fed chairman, to help the economy recover from a historic financial crisis. As such, it’s a good time to evaluate the results of those measures, and to consider where policy makers should go from here.

To begin, it’s essential to be clear on what monetary policy can and cannot achieve. Fed critics sometimes argue that you can’t “print your way to prosperity,” and I agree, at least on one level. The Fed has little or no control over long-term economic fundamentals—the skills of the workforce, the energy and vision of entrepreneurs, and the pace at which new technologies are developed and adapted for commercial use.

What the Fed can do is two things: First, by mitigating recessions, monetary policy can try to ensure that the economy makes full use of its resources, especially the workforce. High unemployment is a tragedy for the jobless, but it is also costly for taxpayers, investors and anyone interested in the health of the economy. Second, by keeping inflation low and stable, the Fed can help the market-based system function better and make it easier for people to plan for the future. Considering the economic risks posed by deflation, as well as the probability that interest rates will approach zero when inflation is very low, the Fed sets an inflation target of 2%, similar to that of most other central banks around the world.

How has monetary policy scored on these two criteria? Reasonable people can disagree on whether the economy is at full employment. The 5.1% headline unemployment rate would suggest that the labor market is close to normal. Other indicators—the relatively low labor-force participation rate, the apparent lack of wage pressures, for example—indicate that there is some distance left to go.

But there is no doubt that the jobs situation is today far healthier than it was a few years ago. That improvement (as measured by the unemployment rate) has been quicker than expected by most economists, both inside and outside the Fed.

On the inflation front, various measures suggest that underlying inflation is around 1.5%. That is somewhat below the 2% target, a situation the Fed needs to remedy. But if there is a problem with inflation, it isn’t the one expected by the Fed’s critics, who repeatedly predicted that the Fed’s policies would lead to high inflation (if not hyperinflation), a collapsing dollar and surging commodity prices. None of that has happened.

It is instructive to compare recent U.S. economic performance with that of Europe, a major industrialized economy of similar size. There are many differences between the U.S. and Europe, but a critical one is that Europe’s economic orthodoxy has until recently largely blocked the use of monetary or fiscal policy to aid recovery. Economic philosophy, not feasibility, is the constraint: Greece might have limited options, but Germany and several other countries don’t. And the European Central Bank has broader monetary powers than the Fed does.

Europe’s failure to employ monetary and fiscal policy aggressively after the financial crisis is a big reason that eurozone output is today about 0.8% below its precrisis peak. In contrast, the output of the U.S. economy is 8.9% above the earlier peak—an enormous difference in performance. In November 2010, when the Fed undertook its second round of quantitative easing, German Finance Minister Wolfgang Schäuble reportedly called the action “clueless.” At the time, the unemployment rates in Europe and the U.S. were 10.2% and 9.4%, respectively. Today the U.S. jobless rate is close to 5%, while the European rate has risen to 10.9%.

Six years after the Fed, the ECB has begun an aggressive program of quantitative easing, and European fiscal policy has become less restrictive. Given those policy shifts, it isn’t surprising that the European outlook appears to be improving, though it will take years to recover the growth lost over the past few years. Meanwhile, the United Kingdom is enjoying a solid recovery, in large part because the Bank of England pursued monetary policies similar to the Fed’s in both timing and relative magnitude.

It is encouraging to see that the U.S. economy is approaching full employment with low inflation, the goals for which the Fed has been striving. That certainly doesn’t mean all is well. Jobs are being created, but overall growth is modest, reflecting subpar gains in productivity and slow labor-force growth, among other factors. The benefits of growth aren’t shared equally, and as a result many Americans have seen little improvement in living standards. These, unfortunately, aren’t problems that the Fed has the power to alleviate.

With full employment in sight, further economic growth will have to come from the supply side, primarily from increases in productivity. That means that the Fed will continue to do what it can, but monetary policy can no longer be the only game in town. Fiscal-policy makers in Congress need to step up. As a country, we need to do more to improve worker skills, foster capital investment and support research and development. Monetary policy can accomplish a lot, but, as I often said as Fed chairman, it is no panacea. New efforts both inside and outside government will be essential to sustaining U.S. growth.

Editors Note: This op-ed first appeared in The Wall Street Journal on October 4, 2015.