A powerful feature of the Egyptian revolution was the equality between the very different actors who initiated it.

Rising energy and commodity prices helped create the global food crisis, which fed the financial crisis.

The products of the Bone Wars resulted in an increase in knowledge of prehistoric life, and sparked the public's interest in dinosaurs, leading to continued fossil excavation in North America in the decades to follow.

A little more than a year after the 1997 exchange rate debacle triggered Asian economies worst recession in decades, they were thriving again.

When a country gives up its monetary sovereignty, its banks are effectively borrowing in a foreign currency, making them exceptionally vulnerable to liquidity shocks, like that which sparked turmoil in Europe s banking system in 2010 2011.

Quartz sparked enthusiasm among English speaking Twitter users, as well.

Both are important triggers of change.

To give the graffiti its real power, let's remember the spark that lit the Syrian revolt flame.

5aled_DH I hope this is the spark that wakes up the nation from its slumber

This sparked the brief but bitter civil war.

Forty years ago Mao Zedong launched the Cultural Revolution.

The defeat of French army at the Battle of Bailén in Spain on 27 July 1808 triggered the war.

I will make them to pass with your enemies into a land which you don't know for a fire is kindled in my anger, which shall burn on you.

And I will make thee to pass with thine enemies into a land which thou knowest not for a fire is kindled in mine anger, which shall burn upon you.

Given these conditions, even a small spark could ignite a wildfire.

The politically charged questionnaire that triggered the protest on November 26, 2012.

The bonfire was sparked by the collapse of the Thai baht in the summer of 1997.

Nothing works as potently to inflame protectionist sentiment as large trade deficits.

The protest energy that briefly electrified Tiananmen Square dissipated out of the cities and spread across the countryside.

His presence in the country might well spark a clamor for his reluctant return to politics.

Eight years ago, electoral fraud during the 2004 presidential vote sparked the protests that came to be known as the Orange Revolution.

Viewers were kept on their toes, with an 18 minute advertising slot before the show, which ignited their anger and sarcasm

4 days after 4 yr anniversary of the start of the Arab Spring, Tunisia votes Sunday. A bright spot of democratic growth in a field of weeds Brian Klaas ( brianklaas) December 19, 2014

These resignations have sparked outrage from opposition bloggers who believe that the Kremlin is reneging on promises to loosen its grip on central power.

Kyrgyz artist Gulzada Ryskulova has rocked the local music scene with a powerful take on an epic poem that serves as a fundament of the Central Asian country's culture.

Some evidence suggests that the prevalence of uncertainty may boost competition, thereby sparking innovation.

The MDG summit is missing an opportunity to begin this much needed revolution in our understanding of economic development as well.

The heat from the explosion set fire to the forest below it, and then the shock wave came down and knocked down trees for hundreds of square miles, okay?

The night of November 17 Black Friday, as it quickly came to be known set Czechoslovakia alight.

The fuses were the new information technologies of the Internet and satellite television, such as Al Jazeera.

The trigger for the current controversy came during a scene in a musical by the National Symphony Orchestra of the Ministry of Culture and Youth, performed for young students at the National Theater.

Not surprisingly, the spike in food prices was a contributing factor in the civil unrest that sparked the Arab Spring.

In Tunisia, whose revolution ignited the wildfire of change that quickly spread across the region, young people account for 70 of total unemployment.

The news also rekindled debate about the death penalty in India and whether it was likely to deter or provoke future terrorist attacks.

A hot, dry summer (in some places) has triggered another barrage of such claims.

They provided an early spark, but it looks like the spark did not catch.

FEZ Just over a year ago, the Arab Spring sparked dramatic change throughout the Arab world.

For once, what has set financial markets ablaze are not their excesses, but those of Wall Street.

That is why climate advocates are increasingly looking for other means of triggering action. Finance is at the top of their list.

As many might remember, it was in Tunisia, as a result of the demonstrations in Sidi Bouzid, where the revolutions and uprisings, collectively known as Arab Spring, came into being.

The decision triggered a severe response from China, where students held demonstrations against his visit. Bilateral relations were frozen.

When she became the first woman to be British Prime Minister, she fired the ambitions of countless young women around the world (including mine).

The Lahad Datu standoff also sparked a humanitarian crisis after scores of Sabah residents with Filipino ancestry were arrested and more than 1,500 migrant Filipinos sought refuge in the Philippines.

In some countries, notably the United States, these tensions between science and religion have fuelled the current creation evolution controversy, a religious conflict focusing on politics and public education.

High food prices may have served as a trigger in North Africa, but the speed with which the protesters turned their attention to political reform caught everyone off guard.