As the world becomes increasingly urbanized, the number of megacities is growing rapidly. Today there are 37 cities worldwide with populations of greater than 10 million, and 84 with populations...

Philip E. Karp, Peter Ellis, Barjor Mehta |

When you think of Peru, the first city that usually comes to mind is Lima. Why? Well, because Lima is the largest city in the country, with close to 50% of the nation’s urban population living in...

Zoe Elena Trohanis |

History repeats, history rhymes and sometimes history regresses. Wandering through cities and fields in the Middle East and North Africa a thousand years ago, you would have been struck by the...

Torgny Holmgren |

Also available in: Español    Women maintaining roads? As their job? Until recently, the idea was pretty much unfathomable in many countries. But in Peru, it isn’t. Since 2001, the Peruvian...

Ramon Munoz-Raskin, Montserrat Bordas Geli, Sergio Garcia Monroy |

Governments spend a lot of money to contain violence. [[tweetable]]In 2015, some $1.7 trillion was spent on defense by governments worldwide[[/tweetable]] . While the primary responsibility for...

Ede Ijjasz-Vasquez, Bernard Harborne |

We are all too familiar with these figures: on average, only 50% of the population in Latin America is connected to sewerage and 30% of those households receive any treatment. These figures are...

Diego Juan Rodriguez |

Also available in: Español, Français,  中文 People think fast and often automatically, respond strongly to social incentives, and use mental models or specific worldviews to interpret information...

Renos Vakis, Varun Gauri |

View the full infographic here For the past two years, the rains have been poor in Somalia. What comes next is tragically familiar. Dry wells. Dying livestock. Failed harvests. Migration.  Masses...

Claudia W. Sadoff, Dominick Revell de Waal, Edoardo Borgomeo |

Students at Beijing Bayi High School in China. Photo: World Bank In 1950, the average working-age person in the world had  almost three years of education, but in East Asia and Pacific (EAP), the...

Michael Crawford |

Those who have tried toilet training a pet dog or cat know that it is a difficult proposition. How about toilet training a flock of 30 chickens? “Why would I want to?” Because in poor countries,...

Derek Headey |