John Perkins is an American author and activist, best known for his book, "Confessions of an Economic Hitman." In this work, he claims to have worked as an economic consultant for U.S. government and corporate interests, where he allegedly helped manipulate developing countries' economies for profit. His writings focus on the impact of neoliberalism and globalization on poorer nations. Perkins has also been involved in various social and environmental causes, advocating for sustainable development and economic justice. He has spoken at numerous events and written articles addressing issues like corporate greed and the consequences of imperialism. His work aims to raise awareness about the ethical implications of economic policies.