Peter Eigen is the founder and head of Transparency International, a non-governmental organization dedicated to stopping the developed world and its companies from responding to bribery demands from the developing world and its leaders. The TI website has this simple definition of corruption:
What is corruption? Corruption is the abuse of entrusted power for private gain. It hurts everyone whose life, livelihood or happiness depends on the integrity of people in a position of authority.
As he explains in this Friday's TED talk (given last summer at a user-organized TED conference held in Berlin), he saw the results of bribery and corruption firsthand during the years he served as a manager for the World Bank in Nairobi, Kenya:
You may read more about Peter Eigen at this page, and you may catch up on the latest exposures of fraud and bribery on the updates page of Transparency International at this link. Download Peter Eigen's talk from this page.