OPINIONOPINION, Spain, Egypt, Brazil: From the streets to Twitter and backWhat Complexity Science tells us about the growth and spread of political turmoil.
![Spain's Indignados movement attracted a heterogeneous crowd with different partisan interests [Reuters]](https://www.aljazeera.com/wp-content/uploads/2014/06/2014614112019294734_20.jpeg?resize=270%2C180&quality=80)
