Years ago, as the Cold War was coming to an end, I said to my fellow leaders around the globe: The world is on the cusp of great events, and in the face of new challenges all of us will have to change, you as well as we. For the most part, the reaction was polite but skeptical silence.

In recent years, however, during speaking tours in the United States before university audiences and business groups, I have often told listeners that I feel Americans need their own change — a perestroika, not like the one in my country, but an American perestroika — and the reaction has been markedly different. Halls filled with thousands of people have responded with applause.

Over time, my remark has prompted all kinds of comments. Some have reacted with understanding. Others have objected, sometimes sarcastically, suggesting that I want the United States to experience upheaval, just like the former Soviet Union. In my country, particularly caustic reactions have come from the opponents of perestroika, people with short memories and a deficit of conscience. And although most of my critics surely understand that I am not equating the United States with the Soviet Union in its final years, I would like to explain my position.

Our perestroika signaled the need for change in the Soviet Union, but it was not meant to suggest a capitulation to the U.S. model. Today, the need for a more far-reaching perestroika — one for America and the world — has become clearer than ever. It is true that the need for change in the Soviet Union in the mid-1980s was urgent. The country was stifled by a lack of freedom, and the people — particularly the educated class — wanted to break the stranglehold of a system that had been built under Stalin. Millions of people were saying: "We can no longer live like this."

We started with glasnost — giving people a chance to speak out about their worries without fear. I never agreed with my great countryman Alexander Solzhenitsyn when he said that "Gorbachev's glasnost ruined everything." Without glasnost, no changes would have occurred, and Solzhenitsyn would have ended his days in Vermont rather than in Russia.

At first, we labored under the illusion that revamping the existing system — changes within the "socialist model" — would suffice. But the pushback from the Communist Party and the government bureaucracy was too strong. Toward the end of 1986, it became clear to me and my supporters that nothing less than the replacement of the system's building blocks was needed.

We opted for free elections, political pluralism, freedom of religion and an economy with competition and private property. We sought to effect these changes in an evolutionary way without bloodshed. We made mistakes. Important decisions were made too late, and we were unable to complete perestroika.

Two conspiracies hijacked the changes — the attempted coup in August 1991, organized by the hard-line opponents of our reforms, which ended up weakening my position as president, and the subsequent agreement among the leaders of Russia, Ukraine and Belarus to dissolve the Union. Russia's leaders then rejected the evolutionary path, plunging the country into chaos.

Nevertheless, when I am asked whether perestroika succeeded, I reply: Perestroika won, because it brought the country to a point from which there could be no return to the past.

In the West, the breakup of the Soviet Union was viewed as a total victory that proved that the West did not need to change. Western leaders were convinced that they were at the helm of a well-functioning, almost perfect economic model. Scholars opined that history had ended. The "Washington Consensus," the dogma of free markets, deregulation and balanced budgets at any cost, was force-fed to the rest of the world. But then came the economic crisis of 2008 and 2009, and it became clear that the new Western model was an illusion that benefited chiefly the very rich. Statistics show that the poor and the middle class saw little benefit from the economic growth of the past decades.

The current global crisis demonstrates that the leaders of major powers, particularly the United States, had missed the signals that called for a perestroika. The result is a crisis that is not just financial and economic. It is political, too. The model that emerged during the final decades of the 20th century has turned out to be unsustainable. It was based on a drive for super-profits and hyper-consumption for a few, on unrestrained exploitation of resources and on social and environmental irresponsibility.

But if all the proposed solutions and action now come down to a mere rebranding of the old system, we are bound to see another, perhaps even greater upheaval down the road. The current model does not need adjusting; it needs replacing. I have no ready-made prescriptions. But I am convinced that a new model will emerge, one that will emphasize public needs and public goods, such as a cleaner environment, well-functioning infrastructure and public transportation, sound education and health systems and affordable housing.

Elements of such a model already exist. Having rejected the tutorials of the International Monetary Fund, countries such as Malaysia and Brazil have achieved impressive rates of economic growth. China and India have pulled hundreds of millions of people out of poverty. By mobilizing state resources, France has built a system of high-speed railways, while Canada provides free health care. Among the new democracies, Slovenia and Slovakia have been able to mitigate the social consequences of market reforms. The time has come for "creative construction," for striking the right balance between the government and the market, for integrating social and environmental factors and demilitarizing the economy.

However different the problems that the Soviet Union confronted during our perestroika and the challenges now facing the United States, the need for new thinking makes these two eras similar. In our time, we faced up to the main tasks of putting an end to the division of the world, winding down the nuclear arms race and defusing conflicts. We will cope with the new global challenges as well, but only if everyone understands the need for real, cardinal change — for a global perestroika.

Mikhail Gorbachev, the last general secretary of the Communist Party of the Soviet Union, heads the International Foundation for Socio-Economic and Political Studies, a Moscow-based think tank.