There was significant publicity last year when the world population reached 7 billion. Barely a whisper was heard when the global population of slum dwellers exceeded 1 billion. When the world's population reached 7 billion, it was used as a moment to reflect on sustainable growth, resources and the common good for humanity. This 'milestone' of 1 billion slum dwellers needs to also serve as a teaching moment to reflect on urbanization, migration, human development and the underlying causes that have lead to this explosive growth primarily in the developing world.
Via Seth Dixon