80:20: Development in an Unequal World, Seventh Edition
Edited by Tony Daly, Ciara Regan, Colm Regan

This is an education resource for up to first year college students by an international groups of authors to provide an accessible overview of development and human rights issues.  The 80:20 ratio refers to the over 80% of the world's population living in the 'Developing World' and the less than 20% in the 'Developed World'.