How self-organized groups of people are changing the world

A popular quote on the internet, often attributed to the U.S. anthropologist Margaret Mead, is: “Never doubt that a small group of thoughtful, committed, citizens can change the world. Indeed, it is the only thing that ever has.”

Our stories this week demonstrate how dedicated and self-organized groups of people change the world in small and large ways, at different scales and for different reasons.

And all of these stories take place in city streets: from the local urban scale, where North American cycling advocates spread safety information, to the national scale as an entire dictatorship is toppled after thousands of protesters took to the streets in cities across Sudan.

In Mexico, women and girls have taken up the #MeToo movement, protesting and marching through cities there.

And on a more local and individual scale, graffiti artists contribute (legally and illegally) to everyday urban life by making places more unique and identifiable.

Nehal El-Hadi

Science + Technology Editor

How Sudan’s protesters upped the ante, and forced al-Bashir from power

Andrew Edward Tchie, University of Essex

Sudanese protesters against al-Bashir's regime have scored an important victory. But there's a long way to go before democracy is restored.

Why al-Bashir’s fall is only the start of a new Sudan

David E Kiwuwa, University of Nottingham

The time for fundamental political reforms in Sudan is now with the end of al-Bashir's rule.

#MeToo in Mexico: women finding their voice as campaign gathers force

Deborah Shaw, University of Portsmouth

The backlash against sexual harassment and assault of women in Mexico was slow to get started, but thanks to a Twitter campaign, women in all professions are now beginning to speak out.

Better city bike maps are made by volunteers

Colin Ferster, University of Victoria; Meghan Winters, Simon Fraser University

Volunteers can contribute data to maps that help cyclists choose their routes and let planners know how city cycling can be improved.

Civic crowdfunding reduces the risk of ‘bikelash’

Kate Gasparro, Stanford University

This collective fundraising technique helps defuse anti-cyclist sentiment before it dooms protected bike lanes and other new infrastructure.

Graffiti is an eye-catching way to create lively spaces in cities

Alexandra Parker, Gauteng City-Region Observatory

Graffiti contributes to place-making by creating meaningful or identifiable spaces.