Much of the world is making great leaps in technology, security, and public health. But some cities are getting left behind.

In these distressed urban areas, the unemployment rate is high, equality is low, healthcare and safety are poor, and people fear for their life on a daily basis, wondering whether the government will ever step in to help.

Robert Muggah, a global security expert and research director at the think tank Igarapé Institute, has found 11 such factors that collectively make a city vulnerable to societal or economic collapse. Muggah calls this "fragility."

Using data from United Nations University, the World Economic Forum, and SecDev, Muggah has created a dynamic picture of where the most fragile cities are located. Small blue dots represent stable cities. Large red ones are the most fragile.

Here are the cities that are most likely to fall apart.