From alternet.org, here's 2 articles dealing with books on the growing significance of slums around the world and the ways how western powers exploit smaller,weaker countries and effectively control using economic means.

The first article describes slums and how their growth possibly signals a new kind of political movement. It describes how as slums are becoming more populated and established, they are taking on a look of permanence with banks, supermarkets and restaurants being opened inside them, as well people who live in slums represent a new class of citizens. It also includes reviews of 2 books on the world of slums.
The article features a numbing fact "Eighty-five percent of the developing world's urban population now lives in slums" which shows how in spite of growing prosperity of developing countries including India and Brazil, many of their people are still poor and are not even properly housed.

This other article is an interview with a former economist/consultant who wrote a book called Confessions of an Economic Hit Man in which he describes the way how rich nations, specifically the USA would go into poorer nations and offer them big loans for national projects which would then be contracted to American companies. Saddled with debt from the big loans, these poor nations would then be forced to turn to the US government, the WorldBank and other major financial institutions for even more money, making them reliant on foreign aid and deepening their national debt. Really sobering and quite ingenious in a sinister way, how through seemingly harmless business deals and loans a country can be brought under control and its resources exploited by a powerful nation.
The article gives a clearer idea of how many peoples' lives can be affected by policies of richer nations, albeit through non-violent but equally criminal means. From this, it's easy to derive why there's so much hatred and anger over richer countries by people around the world.