LONDON — In Chile, the spark was an increase in subway fares. In Lebanon, it was a tax on WhatsApp calls. The government of Saudi Arabia moved against hookah pipes. In India, it was about onions.
Small pocketbook items became the focus of popular fury across the globe in recent weeks, as frustrated citizens filled the streets for unexpected protests that tapped into a wellspring of bubbling frustration at a class of political elites seen as irredeemably corrupt or hopelessly unjust or both. They followed mass demonstrations in Bolivia, Spain, Iraq and Russia and before that the Czech Republic, Algeria, Sudan and Kazakhstan in what has been a steady drumbeat of unrest over the past few months.
At first glance, many of the demonstrations were linked by little more than tactics. Weeks of unremitting civil disobedience in Hong Kong set the template for a confrontational approach driven by vastly different economic or political demands.
Yet in many of the restive countries, experts discern a pattern: a louder-than-usual howl against elites in countries where democracy is a source of disappointment, corruption is seen as brazen, and a tiny political class lives large while the younger generation struggles to get by.
“It’s young people who have had enough,” said Ali H. Soufan, chief executive of The Soufan Group, a security intelligence consultancy. “This new generation are not buying into what they see as the corrupt order of the political and economic elite in their own countries. They want a change.”
Few were as surprised as the leaders of those countries.
On Thursday, the President Sebastián Piñera of Chile boasted that his country was an oasis of stability in Latin America. “We are ready to do everything to not fall into populism, into demagoguery,” he said in an interview published in The Financial Times.
The next day, protesters attacked factories, torched subway stations and looted supermarkets in Chile’s worst upheaval in decades, eventually forcing Mr. Piñera to deploy troops to the streets. By Wednesday, at least 15 people were dead, and a clearly rattled Mr. Piñera had spoken of “war against a powerful and implacable enemy.”
In Lebanon, Prime Minister Saad al-Hariri survived recent embarrassing revelations about a $16 million gift to a bikini model whom he met at a luxury resort in the Seychelles in 2013, a move that, for some critics, epitomized Lebanon’s ruling class. Then last week he announced the tax on WhatsApp calls, setting off a revolt.
Decades of discontent over inequality, stagnation and corruption erupted into the open, drawing as much as a quarter of the country into euphoric antigovernment demonstrations driven by chants of “Revolution!”
With one of the highest levels of public debt and intractably low employment, Lebanon seems incapable of providing basic public services like electricity, clean drinking water or reliable internet service. Austerity measures have hollowed out the middle class, while the richest 0.1 percent of the population — which includes many politicians — earns a tenth of the country’s national income, much of it, critics say, from plundering the country’s resources.
On Monday Mr. Hariri scrapped the planned tax, announcing a hasty reform package to rescue the country’s sclerotic economy and pledging to recover public trust.
Although the recent scattering of mass protests appears dramatic, scholars say it is a continuation of a rising trend. For decades, societies across the world have become far likelier to pursue sweeping political change by taking to the streets.
The rate of protest has accelerated sharply of late, as various factors have converged: a slowing global economy, dizzying gaps between rich and poor and a youth bulge that in many countries has produced a restive new generation fizzing with frustrated ambition. In addition, the expansion of democracy has stalled globally, leaving citizens with unresponsive governments frustrated and activists sure that street action is the only way to force change.
But as protest movements grow, their success rates are plunging. Only 20 years ago, 70 percent of protests demanding systemic political change achieved it — a figure that had been growing steadily since the 1950s, according to a study by Erica Chenoweth, a Harvard University political scientist.
In the mid-2000s, that trend reversed. Success rates now stand at 30 percent, the study said, a decline that Professor Chenoweth called staggering.
These two trends are closely linked. As protests become more frequent but likelier to flounder, they stretch on and on, becoming more contentious, more visible — and more apt to return to the streets when their demands go unmet. The result may be a world where popular uprisings lose their prominence, becoming simply part of the landscape.
“Something has really shifted,” Professor Chenoweth said in an interview.
“You could say these protests mirror what’s going on in the United States,” said Vali Nasr, a Middle East scholar who recently stepped down as dean of Johns Hopkins School of Advanced International Studies in Washington. In countries where elections are decisive, like the United States and Britain, skepticism about the old political order has produced populist, nationalist and anti-immigrant results at the polls.
“In other countries, where people don’t have a voice, you have massive protests erupting,” he said.
The disparate outbreaks of unrest have not gone unnoticed at the United Nations. Secretary General António Guterres raised them at a meeting of the International Monetary Fund this past weekend, his spokesman, Stéphane Dujarric, said on Tuesday. Critics have accused the I.M.F. of exacerbating economic hardships in countries like Ecuador through austerity measures imposed to reduce debts.
“We are seeing demonstrations in different places, but there are some commonalities,” Mr. Dujarric said, citing “people feeling they are under extreme financial pressure, the issue of inequality, and a lot of other structural issues.”
Some experts say the rash of global protests is too diverse to neatly categorize or ascribe to a single theme. Michael Ignatieff, president of Central European University, was in Barcelona last week as more than 500,000 people thronged the streets after a court sentenced former separatist leaders to prison.
While the Barcelona protests bore some resemblance to mass demonstrations in other cities, Mr. Ignatieff said it would be a mistake to lump them together. “People are not being swept away by the madness of the crowds,” he said. “This is politics, with specific causes and specific issues. If you don’t acknowledge that, you make popular politics look like a series of crazy fashions, like the same trousers or headgear.”
Still, within some regions, the protests are often similar to each other.
In the Middle East, the tumult has drawn inevitable comparisons with the upheavals of the Arab Spring of 2011. But experts say these recent protests are driven by a new generation that cares less about the old sectarian or ideological divides.
Instead of calling for the head of a dictator as many Arabs did in 2011, the Lebanese have indicted an entire political class.
“They are stealing and pretending that they aren’t. Who’s responsible, if not them?” Dany Yacoub, 22, said on Monday, the fourth day she had spent protesting in central Beirut. She studied to be a music teacher, but said she cannot find a job because it takes political connections to get hired in a school. “We don’t believe them anymore,” she said.
Many Arabs have been wary of popular protest since the Arab Spring uprisings, heeding doom-tinged warnings from authoritarian leaders that any upheaval could tip their societies into the same violent chaos as Libya, Syria or Yemen.
“Syria has been the boogeyman for a very long time,” said Maha Yahya, director of the Carnegie Middle East Center in Beirut. “But Algeria and Sudan showed that chaos does not have to be the answer.”
Even in Saudi Arabia, where the threat of government repression makes public protests practically unthinkable, an unusual rebellion erupted on social media over a 100 percent tax on bills at restaurants with water pipes, or hookahs. The Arabic hashtag “tax on hookah restaurants” trended in the kingdom. Some Twitter commentators said the tax contradicted the ruling family’s desire to change Saudi Arabia’s ultraconservative image.
If protests are quicker to stir and more widespread than in earlier decades, they are also more fragile. The painstaking mobilization that once was a feature of grass-roots movements was slow but durable. Protests that organize on social media can rise faster, but collapse just as quickly.
Authoritarian governments have also learned to co-opt social media, using it to disseminate propaganda, rally sympathizers or simply spread confusion, Professor Chenoweth said.
And even where there is a spasm of protest, it takes a lot more for it to snowball into a full opposition movement. The soaring price of onions in India caused farmers to block highways and mount short-lived protests. But frustration has yet to sharpen into mass demonstrations because there is nobody to channel it: India’s opposition is in disarray; divisions of caste and religion dominate politics; and the government of the Hindu nationalist prime minister, Narendra Modi, constantly raises the threat of neighboring Pakistan to distract the public.
Reporting was contributed by Vivien Yee and Hwaida Saad from Beirut, Lebanon; Jeffrey Gettleman from New Delhi; and Nicholas Casey and Rick Gladstone from New York.