Power Systems is a collection of interviews between Noam Chomsky and David Barsamian, covering a wide range of political and social issues facing the world today. The book addresses the power structures that dominate global politics, economics, and culture, examining the ways in which governments, corporations, and elites maintain their influence over society. Chomsky critiques the role of neoliberalism, imperialism, and corporate power in perpetuating inequality and environmental degradation.

Throughout the conversations, Chomsky provides a critical analysis of the political dynamics of the twenty-first century, from the U.S. foreign policy and corporate globalization to the rise of populist movements and the challenges of climate change. He explores the possibilities for resistance and the importance of grassroots organizing and democratic movements in challenging entrenched power.

Chomsky and Barsamian also discuss the significance of education, activism, and the media in shaping public consciousness and promoting social change. They highlight how people around the world can unite to push for policies that prioritize human rights, environmental sustainability, and social justice.